1. A method for updating address data for a plurality of mailpieces processed by a document processing system prior to delivery by a postal authority, the method comprising the steps of: using an address list at a document service provider, the address list being associated with a grouping of mailpieces associated with a client; updating at least some of the address data contained in the address list for compliance with one or more regulations of the postal authority or any requirement of the client; converting the updated address list into a format required by an imaging system associated with the document processing system; storing the converted address list onto the document processing system; processing the mailpieces on the document processing system; capturing an image of an address positioned on each mailpiece by the imaging system; comparing information from the captured image of each mailpiece with the stored address list; and printing delivery information approved by the postal authority on mailpieces requiring an address update as indicated by the comparing of information to updated client address data.