Settlement processing device, biometric information registration device, information processing system, and settlement processing method

A biometric information registration device comprising:

• one or more memories storing instructions;
• and
• one or more processors are configured to execute the instructions to:
• register registration biometric information that is biometric authentication information used to identify a customer;
• acquire settlement information used to settle a purchased product by the customer;
• generate code information in which the registration biometric information and the settlement information are embedded;
• and
• output the code information.

A settlement processing method performed by a computer, comprising:

• acquiring information regarding a purchased product purchased by a customer;
• acquiring registration biometric information that is biometric authentication information used to identify the customer and settlement information used to settle the purchased product by the customer, recorded in a medium carried by the customer;
• acquiring collation biometric information used to collate the customer at the time of settlement;
• collating the registration biometric information with the collation biometric information;
• and
• performing settlement of the purchased product by using the settlement information used to settle the purchased product by the customer, in a case where the registration biometric information and the collation biometric information match.