Settlement device and settlement method

A settlement method, comprising:

• receiving input of an identification number related to electronic settlement;
• executing settlement processing for a transaction using the electronic settlement;
• and
• generating, upon completion of the settlement processing, based on setting information in which an unidentifiable range of digits of the identification number is set for each type of medium to be output, the identification number having the unidentifiable range of digits for each type of the medium, and outputting the generated identification number together with information based on the transaction.

A POS terminal, comprising:

• a commodity registration device;
• and
• a settlement device, comprising:
• a reception component configured to receive input of an identification number related to electronic settlement;
• a settlement component configured to execute settlement processing for a transaction using the electronic settlement;
• and
• an output component configured to generate, upon completion of the settlement processing, based on setting information in which an unidentifiable range of digits of the identification number is set for each type of medium to be output, the identification number having the unidentifiable range of digits for each type of the medium, and to output the generated identification number together with information based on the transaction.