1. A computer program product, comprising a non-transitory computer readable storage medium having stored/encoded thereon computer readable program instructions configured to cause a processor, upon execution thereof, to: perform optical character recognition (OCR) on an image of a document; extract an identifier of the document from the image based at least in part on the OCR; compare at least portions of the identifier with content from one or more reference data sources; and determine whether the identifier is valid based at least in part on the comparison; wherein the content from the one or more reference data sources comprises global address information; wherein the content from the one or more reference data sources is derived from geographic information organized in one or more of a proprietary address database and an open source address database; and wherein deriving the content from the geographic information comprises: obtaining the geographic information from one or more of the proprietary address database and an open source address database; and parsing the geographic information according to a set of predefined heuristic rules, wherein the set of predefined heuristic rules are configured to normalize the global address information obtained from the one or more sources according to a single convention for representing address information.
1. A computer program product, comprising a non-transitory computer readable storage medium having stored/encoded thereon computer readable program instructions configured to cause a processor, upon execution thereof, to: perform optical character recognition (OCR) on an image of a document; extract an identifier of the document from the image based at least in part on the OCR; compare at least portions of the identifier with content from one or more reference data sources; and determine whether the identifier is valid based at least in part on the comparison; wherein the content from the one or more reference data sources comprises global address information; wherein the content from the one or more reference data sources is derived from geographic information organized in one or more of a proprietary address database and an open source address database; and wherein deriving the content from the geographic information comprises: obtaining the geographic information from one or more of the proprietary address database and an open source address database; and parsing the geographic information according to a set of predefined heuristic rules, wherein the set of predefined heuristic rules are configured to normalize the global address information obtained from the one or more sources according to a single convention for representing address information. 5. The computer program product as recited in claim 1 , wherein comparing at least portions of the identifier with content from one or more reference data sources comprises fuzzy matching the identifier with the content from the one or more data sources.