Certify Zip Code Bulletin For Free

How to Validate an Address with the USPS Address Lookup Tool Enter the street address, city, state, and ZIP Code in the designated fields. ... Click ?Find? Examine the results to ensure the address is accurate and conforms to USPS formatting rules.

If a mailpiece is dropped off at a 24-hour postal location before the last pickup time listed at that location, it would be postmarked with the date it was dropped off. Similarly, if a mailpiece is deposited in a Collection Box receptacle before the last pickup time, it will be collected and postmarked that same day.

Use a Certificate of Mailing. Certificate of Mailing service provides a postmarked mailing receipt as evidence that your item was mailed. This is all you need to do: Complete PS Form 3817 at the time of mailing.

Just go to the the postoffice and request a postmark, the person will stamp it right there (peace of mind).

Postmarks are imprints applied in black ink on the address side of stamped letters, flats, and parcels. A postmark shows the name of the United States Postal Service (USPS) office that accepted custody of the mail, along with the state, the zip code, and the date of mailing.

Postmarks are imprints on letters, flats, and parcels that show the name of the USPS office that accepted the mail, along with the state, the zip code, and the date of mailing. The postmark is put on your envelope either by machine or by hand with cancellation bars to indicate that the postage cannot be reused.

CASS(Coding Accuracy Support System) Certification is program that was developed by the USPS to test the accuracy of address-matching software and improve the accuracy of postal coding, such as ZIP+4 Code®, carrier route and 5-digit ZIP Code coding.