Can the Forever Stamp be used for International Mail?
Yes, but keep in mind, the postage value of the Forever Stamp is the domestic First-Class Mail single-piece 1-ounce letter rate that is in effect on the day of use (mailing). Since the international postage rates are always higher than the comparable domestic rates, additional postage would have to be affixed. Any nondenominated stamps (except for those that bear unique markings, such as First-Class Presort, Nonprofit Org.) may be affixed to items that are sent to foreign countries. The postage value of such stamps is linked to its appropriate domestic rate (e.g., the “Lady Liberty and U.S. Flag” stamp has a postage value of 39 cents).
