Nondenominated Postage Stamps
Nondenominated postage stamps do not have a specific amount of postage noted on the stamp. They have mostly been issued in the past when postage prices were scheduled to increase, but the specific prices had not yet been determined. Older nondenominational stamps may continue to be used for Domestic or International mail, unless noted otherwise. Please make sure you know the value of the older stamp and ensure that you have affixed the proper amount of postage to your mailpiece.
Some examples of what nondenominated postage stamps look like are as follows:
2011 Art Deco Bird nondenominated, nonprofit (5-cent value) definitive stamp
2011 Save Vanishing Species (60-cent value) semipostal stamp
2007 American Flag (41-cent value) semipostal stamp
2012 Spectrum Eagle (25-cent value) Presorted First-Class Mail® stamp
For a complete list of the Nondenominational stamps that have been issued and what their corresponding value is, please refer to the Nondenominated Postage page on USPS.com®.