The present subject matter relates generally to techniques and/or equipment for validating mail items within a mail processing system. Sort scheme data and mail item identification data are loaded into the mail processing system. The mail item identification data includes a mail owner identification value and a unique mail item identifier. Then, mail item identification data is acquired from each of the mail items processed in the system and validated against the loaded mail item identification data. The method may involve storing mail item validation data. The mail items are sorted in accordance with the loaded sort scheme data. Further, the present subject matter relates generally to building reports based on the information derived from the techniques and/or equipment utilized therein.