Patent ID: 8526024

Claim:
A server for managing the operation history of document data, comprising: a receiving unit configured to receive first information obtained by decoding a code image attached to an original document at the time of duplication, and second information that is information of a code image attached to a duplicated document and which is obtained by updating the first information; a first saving processing unit configured to save information included in the first information for identifying the original document and information included in the second information for identifying the duplicated document upon receipt of the first information and the second information; and a second saving processing unit configured to save information for identifying the duplicated document in each predetermined group after the saving is performed in the first saving processing unit, wherein the second saving processing unit, when the number of pieces of information for identifying the original document saved by the first saving processing unit is two or more, integrates each group including the same information as the saved information for identifying the original document into one group.