What is the face value of US forever stamps?
The USPS forever stamps do not have face values. These non-denominated stamps are valid for first class mails. They are called forever stamps because their value remains perpetually the same even if the postal service rates go up. For example if you bought a forever stamp for $ 0.39 and the first class mail increases to $0.44, you can still use your forever stamp in your postage for no additional charge.
