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DAT-PreCheck Software Update

DAT-PreCheck displays and validates the Mailer Identification numbers (MIDs) and Customer Registration Identification numbers (CRIDs) of the Mail Owners and Mail Service Providers identified in a Mail.dat® file. Additionally, DAT-PreCheck validates the Nonprofit Authorization Numbers (NPAs) for any mailing claiming nonprofit pricing. It also provides information outlining the Service Type Identifiers (STIDs) populated in the Mail.dat file. The newest addition to this great validation tool is the ability to validate the Labeling List file dates that were used during the presort process.

The beauty of all this is that it can be done very quickly – allowing you to save valuable time and money. And the best part is that you get the ability to validate this information before you submit Mail.dat files to PostalOne!®.

Learn More about DAT-PreCheck


NOTE: For the most complete and up-to-date requirement information, refer to the "Window Book Product Requirements Guide."


Download DAT-PreCheck™(64-bit)
Release Notes

All Release Notes


This is a Mandatory Release for compliance with the Rate changes going into effect July 9,2023


Known Issues:




T25496: Updates were made to the toolset that controls the user interface.



Bug Fixes:


    Visit the DAT-PreCheck User Guides page for information on any Enhancements