The Forever Stamp first went on sale in April 2007. Since then, more than 6 billion Forever Stamps have been sold.
As the name suggests, Forever Stamps can be used to mail a one-ounce letter regardless of when the stamps are purchased or used and no matter how prices may change in the future.
Forever Stamps are always sold at the same price as a regular First-Class Mail stamp.
The Postal Service developed the Forever Stamp for consumers to ease the transition during price changes.
Forever Stamps are available for purchase at post offices nationwide, online at usps.com, by phone at 1-800-STAMP-24, and from Automated Postal Centers and ATMs. They are sold in booklets of 20 and sheetlets of 18.
Customers can use Forever Stamps for international mail, but since all international prices are higher than domestic prices, customers will need to attach additional postage. The value of the Forever Stamp is the domestic First-Class Mail letter price in effect on the day of use.
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