Precanceled stamps are available in coils of 500, 3,000, and 10,000. How many should you buy? It depends on the size of your mailing. Just like with regular stamps, there are no savings for buying large quantities of precanceled stamps. Also, you can’t return unused stamps to the Post Office. To buy the precanceled stamps you must go to the retail counter at a Post Office. Some smaller Post Offices don’t keep a large supply of precanceled stamps, so call ahead if you are buying a large quantity. Be sure to buy the right stamps. Self-adhesive stamps are available.
Affix Precanceled Stamps to Your Mailpieces
Precanceled stamps are affixed to mailpieces just like regular stamps. Some letter shops and presort bureaus have machines that apply precanceled stamps to mailpieces, so precanceled stamps are still an option even if you have someone else prepare your mail.
Precanceled stamps must be placed in the upper right corner of the mailpiece. If you’re using precanceled stamps on a flat (large envelope), place the stamp in the upper right of the delivery address. Precanceled stamps cannot be used on reusable containers such as boxes or tubes.
--Be sure to buy the correct stamps for the class of mail you're mailing.
--The business mail entry unit does NOT sell precanceled stamps; you must go to the retail counter at a Post Office.
--Are you authorized to mail at nonprofit prices? If so, there’s a precanceled stamp just for nonprofit mailers.
How to apply for a permit to use precanceled stamps
Tips on using precanceled stamps
Quick Service Guide 604b, Precanceled Stamps