All U.S. Commemoratives to be 'Forever' Stamps
According to a write-up in the latest USPS Postal Bulletin, "All new First-Class Mail® commemorative stamps issued in 2011 and beyond will be Forever Stamps. And, forever means forever. Forever Stamps can be used to mail a 1-ounce letter regardless of when the stamps are purchased or used and no matter how prices may change in the future. They never lose value. They will always be equal with the current First-Class Mail 1-ounce rate."
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