When your project involves a mass mailing, it is important to verify your addresses are correct and deliverable per USPS specifications. If you've never had your address file certified, you may be surprised at the high number of addresses that are considered undeliverable. Undeliverable mail results in unnecessary and avoidable expenses to your organization.
When sending your mail piece at presorted postal rates, your address file must be certified. To obtain address certification services through the Bureau of Publications, complete our Document Design Request Form STD-7 and check the "Address Prep Services" box. We use a certification product that is approved by the United States Postal Service to certify your mailing list.
We can generally work with most file formats when certifying your address file. For your convenience, you can download our Mass Mailing Template to see how best to format your address file. If your file is structured differently, we will take your data and put it in the correct format needed for our address certification process. Please provide adequate time in your timeline for address certification services.
After completing our analysis process, three different Excel files will be available to you - a file containing the certified addresses, a file of the uncertified addresses and a file of the move updates.
The certified file includes all CASS-certified addresses compared against the USPS's official address file database, as well as any elected move updates. At this point, your certified file requires no further action and is ready for mailing. Please note that your mailing list must be certified no sooner than 95 days prior to the mailing.