USPS Tracking is provided free for domestic Priority Mail. You can print and pay for your Priority Mail Express and Priority Mail postage labels online using Click-N-Ship. Priority Mail Express and Priority Mail envelopes are available at your Post Office or visit You must use the USPS-produced address label for Priority Mail Express. These envelopes, along with stationery and prepaid First-Class Mail postcards and envelopes, can be purchased at the Post Office. Items needing extra protection can be sent in bubble-lined, padded paper, or waterproof envelopes. Letters, bills, greeting cards, and other documents can be sent in standard white, manila, or recycled paper envelopes. Using the correct ZIP Code helps to direct your mail more efficiently and accurately. To find the correct spelling of a city name or to find a ZIP Code, visit or call 1♸00♺SK The correct apartment or suite number helps to ensure delivery to the right location. If the address also has a directional (for instance, NW for Northwest), be sure to use it. Use a Post Office box or street address, but not both. Recipient Name Name of Organization Street Address Use stamps, a postage meter, or a PC Postage system to affix the correct amount. Place labels for extra services above the delivery address and to the right of the return address, or to the left of the postage.

Print or type your address in the upper left corner on the front of the envelope. The accuracy of the address affects the speed and handling of your mail.

USPS Marketing Mail Eligibility Decision Tree.

Designing Letter and Reply Mail (PUB 25).

Usps priority flat rate envelope