Patent ID: 8649026

Claim:
A paper-sheet management method of managing a paper sheet based on an identification number printed on the paper sheet, the method comprising: acquiring a first identification number by performing character recognition on each of a plurality of character data read from a first area in which the identification number is printed on the paper sheet, and allocating a predetermined character when the character recognition is unsuccessful; calculating a first matching ratio representing a ratio by which characters in the same digit in both the first identification number acquired at the acquiring and a second identification number stored in a storage unit match; shifting each character forming the first identification number one digit in a left direction or a right direction when the first matching ratio calculated at the calculating is lower than a predetermined reference value, thereby obtaining a shifted identification number; calculating a second matching ratio representing a ratio by which characters in the same digit in both the shifted identification number shifted at the shifting and the second identification number match, and replacing the first identification number by the shifted identification number when the second matching ratio is equal to or higher than the predetermined reference value.