JP6955238B2 - Payment systems, mobile devices, and payment methods - Google Patents

Description

The present invention relates to a payment system including a POS (Point Of Sales) terminal and the like, and more particularly to a payment system, a mobile terminal, and a payment method for inputting and making a payment by inputting a purchased product.

The labor shortage due to the declining worker population is one of the important issues facing Japan in recent years, and it will be necessary for Japan to carry out its work with a small number of workers in the future.

Labor shortages are also a problem in the retail industry. In the current general POS terminal, the POS terminal occupancy time per shopper is long. This makes it easier for shoppers to form long lines in front of the cashier. In order to complete the queue waiting for the cashier in a short time, increasing the number of POS terminals and increasing the number of cashiers can be considered as a solution, but it is difficult to take this solution due to the shortage of workers. ..

Other solutions include semi-self-registration and self-registration. Here, an operation of inputting the unit price and the number of products, such as reading a barcode of a product, is referred to as an input operation. In addition, the operation of calculating the total amount based on the input and accepting payment by cash, card, etc. shall be called a payment operation. In the case of self-checkout, the shopper performs from the input operation to the payment operation on the POS terminal. In the case of semi-self-registration, usually, only the input operation is performed by the cashier at the POS terminal. The payment operation is performed by the shopper by installing a payment terminal separately from the POS terminal.

In self-registration and semi-self-registration, shoppers perform part or all of the payment processing. Therefore, the store side can complete more payment processing in a shorter time with the same number of cashiers.

Patent Document 1 is a document that describes a technique related to the present invention. In Patent Document 1, a self-registration terminal and a POS terminal are installed in the store. The self-checkout terminal is a terminal in which the customer inputs the product information of the purchased product by himself / herself, and issues a receipt printed with the input information of the purchased product (paragraph 0028 of the same document). After that, when the customer brings the receipt issued by the self-checkout terminal, goes to the POS terminal, and hands the receipt to the person in charge of the POS terminal, the person in charge uses the scanner provided in the POS terminal to print the receipt. Have the printed two-dimensional code read (paragraph 0030 of the same document).

Japanese Unexamined Patent Publication No. 2012-190246

According to the solution using semi-self-registration and self-registration, it is necessary to newly introduce a POS terminal corresponding to semi-self-registration and self-registration.

The present invention has been made in view of such a situation, and the problem to be solved by the present invention is payment that can shorten the time for each shopper to occupy the payment terminal during payment processing. To provide the system.

In order to solve the above-mentioned problems, the present invention is, as one aspect, a payment system including a mobile terminal and a payment terminal owned by the customer before the customer enters the store. depending on the operation of the customer, the first reading means for reading a first identifier corresponding to a plurality of commodity codes, corresponding to the plurality of commodity codes, and one that is different from the first identifier of the first The payment terminal includes a display means for displaying the identifier of 2, and the payment terminal is based on a second reading means for reading the second identifier displayed on the display means and a result read by the second reading means. To provide a payment system provided with a payment processing means for performing payment processing.

Further, the present invention is, in another aspect, a mobile terminal that the customer himself had held before the customer visiting, according to the operation of the customer, first corresponding to a plurality of product code Provided is a mobile terminal including a first reading means for reading an identifier of the above, and a display means corresponding to the plurality of product codes and displaying one second identifier different from the first identifier. ..

Further, as another aspect, the present invention is a program for being executed by a processing device of a mobile terminal owned and operated by the customer before the customer enters the store, and is operated by the customer. depending on, first reading steps of reading a first identifier corresponding to a plurality of commodity codes, and, corresponding to the plurality of commodity codes, and different one of the second and the first identifier Provided is a program for causing a processing device of the mobile terminal to execute a display procedure for displaying an identifier on a display device.

Further, the present invention is, in another aspect, using the portable terminal the customer himself had held before the customer visiting, according to the operation of the customer, first corresponding to a plurality of product code The first reading step of reading the identifier of the above, the display step of displaying one second identifier corresponding to the plurality of product codes and different from the first identifier by using the mobile terminal, the portable. A second reading stage for reading the second identifier displayed on the terminal, and a payment processing stage for performing payment processing based on the result read in the second reading stage using the payment terminal. Provide payment methods including.

According to the present invention, it is possible to omit the time for reading the one-dimensional code from each product in the payment terminal and shorten the occupancy time of the payment terminal per shopper.

It is a block diagram of the payment system 1 which is the 1st Embodiment of this invention. It is a figure for demonstrating the operation of the payment system 1. It is a block diagram of the payment system 50 which is the 2nd Embodiment of this invention. It is a figure for demonstrating the operation of the payment system 50.

The payment system 1 which is the first embodiment of the present invention will be described. In the payment system 1, before the shoppers line up at the cash register, the shopper's own mobile terminal 2 is used to read the one-dimensional code (bar code) of the product, and the product code corresponding to the one-dimensional code of the plurality of products to be purchased. Is converted into one two-dimensional code and displayed. The payment terminal (POS terminal) reads the displayed two-dimensional code and performs payment processing.

The payment system 1 includes a mobile terminal 2, a payment terminal 3, and a database (DB) 4. The payment system 1 is used when a shopper makes a payment for a product purchased at a store such as a supermarket or a convenience store. It is assumed that each product in the store is given a product code as an identifier for identifying the product, and a one-dimensional code representing the product code, a so-called bar code, is attached to the product.

The form in which the barcode is attached to the product does not matter. For example, the barcode may be printed directly on the product or its packaging, or a sticker on which the barcode is printed may be attached to the product or its packaging. Instead of attaching a barcode to the product or the packaging itself, the product may be displayed on a display shelf or the like.

The mobile terminal 2 is a portable information processing device. For example, a smartphone, a mobile phone terminal, a PDA (Personal Data Assistant), a tablet, and a laptop computer can be used as the mobile terminal 2, but a smartphone and a tablet are particularly preferable. In the case of smartphones and tablets, the mobile terminal 2 operates on hardware such as solid-state imaging elements, display devices, and processors included in smartphones and tablets, and OSs (Operating Systems) such as Android, iOS, and Windows mobile. It is realized as a combination of application software.

The portable terminal 2, it is assuming the possession of purchase Monokyaku individual. When the mobile terminal 2 is a shopper's smartphone or tablet, the shopper shall install the above-mentioned application software in advance.

The mobile terminal 2 includes a one-dimensional code reading unit 21, a two-dimensional code generating unit 22, a display unit 23, an input unit 24, and a control unit 25.

The one-dimensional code reading unit 21 includes a solid-state image sensor such as a CCD (Charge-Coupled Device) image sensor and a CMOS (Complementary Metal-Excide-Semiconductor) image sensor, and reads the product code of the product from the barcode attached to the product. read. Each time the one-dimensional code of the product purchased by the shopper is photographed by the solid-state image sensor, the one-dimensional code reading unit 21 extracts the product code of the product from the photographed barcode. Further, the one-dimensional code reading unit 21 generates a product detail composed of the product code based on the extracted product code. The one-dimensional code reading unit 21 adds the corresponding product code to the product details each time the one-dimensional code is read.

The two-dimensional code generation unit 22 obtains a two-dimensional code corresponding to one or a plurality of product codes registered in the product details, and outputs image information indicating the two-dimensional code. The type of two-dimensional code does not matter. For example, it may be a matrix-type two-dimensional code in which small squares are arranged at four corners, such as a QR code (registered trademark). Alternatively, it may be a stack-type two-dimensional code in which a plurality of barcodes are stacked one above the other. When the number of input product codes is large, a plurality of two-dimensional codes are generated.

The display unit 23 is a display device such as a liquid crystal display device or an OEL (Organic Electro-Luminence) display device. The display unit 23 displays the latest product details generated by the one-dimensional code reading unit 21. Further, the display unit 23 displays the two-dimensional code generated by the two-dimensional code generation unit 22.

The input unit 24 is an input device such as a keyboard and a mouse. In the case of smartphones and tablets, the display unit 23 and the input unit 24 are combined and mounted as a touch panel. The input unit 24 also operates as a number input means.

The control unit 25 is a control device that controls each unit of the mobile terminal 2, and includes a processor, a memory, and the like.

The payment terminal 3 is, for example, a POS (Point Of Sales) terminal. The payment terminal 3 is installed at the cash register of the store. The store cashier operates the payment terminal 3 to process the payment, receives the payment from the shopper, and hands the change and the receipt to the shopper. The payment terminal 3 includes a two-dimensional code reading unit 31 and a payment processing unit 32. The payment terminal 3 may be a self-registration or a semi-self-registration. In this case, the shopper performs the operation performed by the cashier.

The two-dimensional code reading unit 31 includes a solid-state image sensor such as a CCD image sensor or a CMOS image sensor, reads the two-dimensional code displayed on the display unit 23 of the mobile terminal 2, and extracts one or a plurality of product codes.

The payment processing unit 32 performs payment processing based on the product code output by the two-dimensional code reading unit 31. The payment processing unit 32 receives the price corresponding to the product code received from the two-dimensional code reading unit 31 from the product master 41 described later, and calculates the total price of the products that the shopper intends to purchase based on the price. .. After that, the settlement processing unit 32 makes a settlement by cash, a card, or the like based on the calculated total amount.

The database 4 is a database management system that stores the product master 41. The product master 41 is a table in which a product code indicating the product, a product name of the product, a price of the product, the number of stocks of the product, and the like are stored in association with each other for each of the products sold by the store. The database 4 and the product master 41 function as a storage means for storing the product master in which the product code and the price of the product indicated by the product code are associated with each other.

The configuration of the payment terminal 3 is a general configuration except that the two-dimensional code reading unit 31 is provided. That is, the payment terminal 3 can be realized by adding, for example, a QR barcode reader as the two-dimensional code reading unit 31 to the POS terminal already installed in the store. Therefore, the payment terminal 3 can be installed in the store at a relatively low cost based on the existing POS terminal, and the introduction cost can be suppressed.

The outline of the operation of the payment system 1 will be described. The shopper uses the one-dimensional code reading unit 21 of the mobile terminal 2 owned by the shopper to read the one-dimensional code (bar code) of each product to be purchased and put it in the shopping cart. The shopper repeats this process until all the items to be purchased are placed in the shopping cart. After reading the one-dimensional code from all the products to be purchased by the one-dimensional code reading unit 21 and putting those products in the shopping cart, the shopper performs a predetermined operation on the mobile terminal 2. In response to this predetermined operation, the two-dimensional code generation unit 22 of the mobile terminal 2 generates a two-dimensional code from the product codes of the plurality of read products, and displays the two-dimensional code on the display unit 23. The cashier reads the displayed two-dimensional code using the two-dimensional code reading unit 31 of the payment terminal 3. The payment processing unit 32 of the payment terminal 3 acquires one or a plurality of product codes corresponding to the two-dimensional code. The payment processing unit 32 of the payment terminal 3 inquires the product master 41 of the database 4 about the price of the product based on the acquired product code.

The operation of the payment system 1 will be described in detail with reference to FIG.

The shopper selects the product he / she wants to purchase from the products displayed in the store and puts the selected product in the shopping cart. When putting a product in a shopping cart, the shopper reads the barcode of the product using the one-dimensional code reading unit 21 of the mobile terminal 2. The one-dimensional code reading unit 21 sequentially registers the products whose barcodes have been read in the product details (step S1). The product details are a list of product codes indicated by the one-dimensional code read by the one-dimensional code reading unit 21. When purchasing the same product more than once, the barcode may be read for each of the products. Alternatively, after reading the barcode from one product, the number may be input via the input unit 24. When canceling the purchase of the product registered in the product statement, the shopper performs an operation of deleting the corresponding detail line from the product detail displayed on the display unit 23 via the input unit 24.

When all the products to be purchased are determined, the shopper performs a predetermined operation via the input unit 24. In response to this predetermined operation, the two-dimensional code generation unit 22 generates a two-dimensional code based on the product details. The display unit 23 displays the two-dimensional code (step S2). As it is, the shopper moves in front of the payment terminal 3.

The cashier uses the two-dimensional code reading unit 31 to read the two-dimensional code displayed on the display unit 23 (step S3). When the payment terminal 3 is an unmanned terminal such as a self-registration or a semi-self-registration, the shopper performs this operation using the payment terminal 3.

The payment processing unit 32 of the payment terminal 3 acquires the price of each product from the product master 41 of the database 4 (step S4) based on the product code indicated by the two-dimensional code, and calculates the total price of the entire product to be purchased. , Settle (step S5).

According to the payment system 1, there are the following effects.

In general, when linking data between terminals, wired or wireless communication is often performed between the terminals. However, it is not desirable from the viewpoint of security to connect the mobile terminal owned by the shopper to the network of the store. Moreover, in an offline environment such as an exhibition hall where it is difficult to lay communication equipment, it is difficult to use a method premised on communication. However, in the payment system 1, data is transmitted via optical reading of the two-dimensional code displayed on the display device. Therefore, the above-mentioned security problem does not occur, and it can be easily applied to an offline environment.

Further, in the payment system 1, the barcode reading operation of the product can be performed at a place other than the vicinity of the cash register where the payment terminal 3 is located. Therefore, the payment terminal 3 does not need to read the barcode of the product. The payment terminal 3 only needs to perform payment processing. Since the amount of processing performed by the payment terminal 3 is reduced, the time for one shopper to occupy the payment terminal 3 is shortened, and the time for the shopper to wait in front of the payment terminal 3 can be shortened. Alternatively, the number of payment terminals installed in the store can be reduced, and the number of cashiers required for store operation can be reduced.

The payment system 50 according to the second embodiment of the present invention will be described. In the above-mentioned payment system 1, it is not determined whether or not the product registered in the product statement by the shopper and the product put in the shopping cart by the shopper match. The payment system 50 determines whether the two match or do not match.

Comparing with the above-mentioned payment system 1 with reference to FIG. 3, in the payment system 50, the payment terminal 3A corresponding to the payment terminal 3 includes a weight scale 33 and a weight comparison unit 34, and the product master 41 has a store. For each of the products for sale, the table should store the product code of the product, the product name of the product, the price of the product, the number of stocks of the product, and the weight of the product in association with each other. Is different.

The weight scale 33 is a weight scale for measuring the weight of the product that the shopper is going to purchase. The weight comparison unit 34 acquires the weight of each product from the product master 41 based on the product code acquired from the two-dimensional code reading unit 31. Then, the weight comparison unit 34 compares the total weight acquired from the product master 41 with the total weight of the products measured by the weight scale 33. Based on the comparison result, the weight comparison unit 34 determines whether or not the product registered by the shopper in the product statement matches the product that the shopper intends to purchase. In the case of a mismatch, the weight comparison unit 34 outputs a message notifying the mismatch.

The operation of the payment system 50 will be described with reference to FIG.

Steps S11 to S14 are the same as steps S1 to S4 described above. Subsequently, the cashier uses the weight scale 33 to measure the weight of all the products that the shopper is trying to purchase (step S15). After measuring the weight of each shopping cart with the product in the shopping cart, the weight of the previously measured shopping cart may be subtracted. Alternatively, the products may be taken out from the shopping cart, the weights of the products may be measured one by one, and the total may be calculated.

Next, the weight comparison unit 34 acquires the weight of each product from the product master 41 based on the product code acquired from the two-dimensional code reading unit 31, and calculates the total value thereof (step S16).

Next, the weight comparison unit 34 compares the weight of the entire product to be purchased measured by the weight scale 33 with the total weight of the products acquired from the product master 41 (step S17).

When both match, the weight comparison unit 34 determines that the product registered in the product statement and the product brought by the shopper to purchase match. In this case, the settlement processing unit 32 executes the settlement process as it is. The settlement process is the same as in step S5 described above.

On the other hand, when the two do not match, the weight comparison unit 34 outputs a message notifying the mismatch. As a message output form, it is conceivable to output as a voice from a speaker (not shown) of the payment terminal 3A, or as an image or a moving image from a display device (not shown) of the payment terminal 3A. You may use a combination of these. In this case, the settlement processing unit 32 does not perform settlement processing.

When the payment terminal 3A is an unmanned terminal and there is no cashier, the shopper performs the work performed by the cashier.

As described above, according to the payment system 50, in addition to the effect of the payment system 1, the effect of being able to confirm the validity of the sales statement by comparing the logical value and the measured value with respect to the total weight of the purchased products. Play.

The present invention is not limited to the first and second embodiments described above. For example, in the above-described embodiment, the code read by the mobile terminal 2 is defined as a one-dimensional code, the code displayed by the mobile terminal 2 is displayed as a two-dimensional code, and the code read by the payment terminal 3 / 3A is described as a two-dimensional code. However, these codes may be optically readable. For example, OCR (Optical Character Recognition) may be performed instead of the one-dimensional code reading unit 21. In this case, human-readable characters (hiragana, katakana, kanji, alphabets, symbols, etc.) are used instead of the one-dimensional code on the product or the shelf on which the product is displayed to provide information on the product such as the product name. Is presented. The mobile terminal 2 machine-recognizes the presented characters and the like by OCR. The same applies to the code generated by the two-dimensional code generation unit 22 and read by the two-dimensional code reading unit 31.

Further, in the first and second embodiments, the mobile terminal 2 has been described as generating the product details consisting of the product code and displaying them on the display unit 23, but instead of the product details consisting of the product code, Alternatively, the product details consisting of the product name, the product code, and the product details consisting of the product name may be generated and displayed. For example, when a table showing the correspondence between some or all product codes of products in a store and a product name is stored in advance in the storage device of the mobile terminal 2 as a part of application software to generate product details. By referring to this table, it is conceivable to generate such a product item. By displaying such a product statement, the shopper can easily grasp the product actually registered in the product statement.

Some or all of the above embodiments may also be described, but not limited to:

(Appendix 1)
A payment system equipped with a mobile terminal and a payment terminal.
The mobile terminal
A first reading means for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier.
An identifier conversion means for outputting a second identifier that corresponds to the product code and is optically readable and is different from the first identifier.
A display means for displaying an image of the second identifier is provided.
The payment terminal is
A second reading means for optically reading the image of the second identifier displayed on the display means and outputting the product code corresponding to the second identifier.
A payment system including a payment processing means that performs payment processing based on the product code read by the second reading means.

(Appendix 2)
The payment system according to Appendix 1, wherein the identifier conversion means outputs one of the second identifiers corresponding to the plurality of product codes.

(Appendix 3)
The mobile terminal is provided with a number input means for inputting the number of products.
The identifier conversion means outputs the number of products input via the number input means and the second identifier corresponding to the product code output by the first reading means. Payment system described in.

(Appendix 4)
The payment system according to any one of Supplementary note 1 to Supplementary note 3, wherein the first identifier is a one-dimensional bar code and the second identifier is a two-dimensional bar code.

(Appendix 5)
The payment system includes a storage means for storing a product master that associates a product code with the price of the product indicated by the product code.
The payment system according to any one of Supplementary note 1 to Supplementary note 4, wherein the payment terminal acquires a price corresponding to the input product code from the storage means, and performs the payment process based on the acquired price.

(Appendix 6)
The payment system includes a storage means for storing a product master that associates a product code with the weight of the product indicated by the product code.
The payment terminal is equipped with a weighing scale.
The payment terminal acquires the weight of the product indicated by the product code, which is input via the second reading means, from the storage means.
The payment terminal further provides a comparison means for comparing the total weight of one or more products measured by the weight scale with the total weight of the one or more products acquired from the product master. The payment system according to any one of Supplementary note 1 to Supplementary note 5 to be provided.

(Appendix 7)
A first reading means for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier.
An identifier conversion means for outputting a second identifier that corresponds to the product code and is optically readable and is different from the first identifier.
A mobile terminal comprising a display means for displaying an image of the second identifier.

(Appendix 8)
The mobile terminal according to Appendix 7, wherein the identifier conversion means outputs one of the second identifiers corresponding to a plurality of product codes.

(Appendix 9)
Equipped with a number input means for inputting the number of products
The identifier conversion means outputs the number of products input via the number input means and the second identifier corresponding to the product code output by the first reading means. Appendix 7 or Appendix 8. The mobile terminal described in.

(Appendix 10)
The mobile terminal according to any one of Supplementary note 7 to Supplementary note 9, wherein the first identifier is a one-dimensional bar code and the second identifier is a two-dimensional bar code.

(Appendix 11)
The first reading procedure, in which the first identifier, which is an optically readable identifier, is optically read and the product code corresponding to the first identifier is output.
An identifier conversion procedure that outputs a second identifier that corresponds to the product code and is optically readable and is different from the first identifier, and
A program for causing a processing device of a mobile terminal to execute a display procedure for displaying an image of the second identifier on a display device.

(Appendix 12)
The program according to Appendix 11, wherein the identifier conversion procedure outputs one of the second identifiers corresponding to a plurality of product codes.

(Appendix 13)
A program that causes the processing device to further execute a numerical input procedure for inputting the number of products.
The identifier conversion procedure outputs the number of products input via the number input procedure and the second identifier corresponding to the product code output by the first reading procedure. The program described in.

(Appendix 14)
The program according to any one of Supplementary note 11 to Supplementary note 13, wherein the first identifier is a one-dimensional bar code and the second identifier is a two-dimensional bar code.

(Appendix 15)
A first reading step, in which a mobile terminal is used to optically read a first identifier, which is an optically readable identifier, to obtain a product code corresponding to the first identifier.
An identifier conversion step of obtaining a second identifier that corresponds to the product code and is optically readable and is different from the first identifier by using the mobile terminal.
A display stage in which an image of the second identifier is displayed using the mobile terminal.
A second reading step in which the image of the second identifier displayed on the mobile terminal is optically read using the payment terminal to obtain the product code corresponding to the second identifier, and
A payment method including a payment processing stage in which payment processing is performed based on the product code read in the second reading stage using the payment terminal.

(Appendix 16)
The payment method according to Appendix 15, wherein the identifier conversion step obtains one of the second identifiers corresponding to the plurality of the product codes.

(Appendix 17)
Further including a number input step of inputting the number of products via the mobile terminal,
The identifier conversion step is described in Appendix 15 or Appendix 16 for obtaining the number of products input in the number input step and the second identifier corresponding to the product code obtained in the first reading step. Payment Method.

(Appendix 18)
The payment method according to any one of Supplementary note 15 to Supplementary note 17, wherein the first identifier is a one-dimensional bar code and the second identifier is a two-dimensional bar code.

(Appendix 19)
In the payment processing stage, the price corresponding to the product code is acquired from the product master in which the product code and the price of the product indicated by the product code are previously associated with each other, and the payment processing is performed based on the acquired price. The payment method according to any one of Supplementary note 15 to Supplementary note 18.

(Appendix 20)
The stage of measuring the weight of one or more products as a whole,
The stage of acquiring the weight of each of the one or more products from the product master in which the product code and the weight of the product indicated by the product code are associated in advance, and
In any one of Appendix 15 to Appendix 19, further comprising a step of comparing the measured weight of the whole of the one or more products with the total weight of the one or more products acquired from the product master. Described payment method.

1,50 Payment system 2 Mobile terminal 3, 3A Payment terminal 4 Database (DB)
21 One-dimensional code reading unit 22 Two-dimensional code generation unit 23 Display unit 24 Input unit 25 Control unit 31 Two-dimensional code reading unit 32 Payment processing unit 33 Weight scale 34 Weight comparison unit 41 Product master

Claims (8)

It is a payment system equipped with a mobile terminal and a payment terminal owned by the customer before the customer enters the store.
The mobile terminal
A first reading means for reading a first identifier corresponding to each of a plurality of product codes according to the customer's operation, and
It is provided with a display means corresponding to the plurality of product codes and displaying one second identifier different from the first identifier.
The payment terminal is
A second reading means for reading the second identifier displayed on the display means, and
A payment system including a payment processing means that performs payment processing based on a result read by the second reading means. The mobile terminal is provided with a number input means for inputting the number of products.
The first aspect of the present invention claims that the display means displays the number of products input via the number input means and the second identifier corresponding to the plurality of product codes output by the first reading means. The payment system described. The payment system according to claim 1 or 2, wherein the first identifier is a one-dimensional bar code and the second identifier is a two-dimensional bar code. The payment system includes a storage means for storing a product master that associates a product code with the price of the product indicated by the product code.
The payment system according to any one of claims 1 to 3, wherein the payment terminal acquires a price corresponding to the input product code from the storage means and performs the payment process based on the acquired price. .. The payment system includes a storage means for storing a product master that associates a product code with the weight of the product indicated by the product code.
The payment terminal is equipped with a weighing scale.
The payment terminal acquires the weight of the product indicated by the product code, which is input via the second reading means, from the storage means.
The payment terminal further provides a comparison means for comparing the total weight of one or more products measured by the weight scale with the total weight of the one or more products acquired from the product master. The payment system according to any one of claims 1 to 4. It is a mobile terminal owned by the customer before the customer enters the store.
A first reading means for reading a first identifier corresponding to each of a plurality of product codes according to the customer's operation, and
A mobile terminal that corresponds to the plurality of product codes and includes a display means for displaying one second identifier different from the first identifier. It is a program that is owned by the customer before the customer enters the store and is executed by the processing device of the mobile terminal operated by the customer.
A first reading procedure for reading a first identifier corresponding to each of a plurality of product codes according to the customer's operation, and a first reading procedure.
A program for causing the processing device of the mobile terminal to execute a display procedure of displaying one second identifier corresponding to the plurality of product codes and different from the first identifier on the display device. The first reading step, in which the first identifier corresponding to each of the plurality of product codes is read according to the operation of the customer by using the mobile terminal owned by the customer before the customer enters the store.
A display stage in which the mobile terminal is used to display one second identifier that corresponds to the plurality of product codes and is different from the first identifier.
A second reading step in which the second identifier displayed on the mobile terminal is read using the payment terminal, and
A payment method including a payment processing stage in which payment processing is performed based on the result read in the second reading stage using the payment terminal.

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