Patent ID: 7860318

Claim:
A system for comparing documents, said system comprising at least one document reader configured to read information on a first document and on a second document, said first and second documents being different types of documents that are carried by an individual; and at least one device comprising a processor responsive to the information read by said document reader, said processor executing instructions to: determine the type of the first document and the type of the second document based on the read information; identify common fields that are included in the first document and the second document, wherein the first document and the second document have at least one field in common; and based on the determined type of the first document and the determined type of the second document, compare the information read from the first document with the information read from the second document to determine whether any of the information read from the first document is identical to any of the information read from the second document, wherein the comparison is performed by comparing the information from the identified common fields of the first document with the information from the identified common fields of second document.