Direct answer: If your old Forever stamps are genuine, unused and intact, you can keep using them for the applicable postage value. You do not need to exchange them merely because their purchase year or the postage price changed.
Use This Four-Step Check
- Confirm the type. Ordinary Forever, Global Forever, Postcard and Additional Ounce stamps have different rate categories.
- Check condition. Do not reuse canceled stamps or mail with mutilated, defaced or questionable postage.
- Calculate the finished mailpiece. Weight, size, shape, rigidity, destination and service determine the required total.
- Apply enough valid postage. Combine stamps when needed; overpayment is generally not refunded.
What About Old 49-Cent or 50-Cent Forever Stamps?
Use them as ordinary Forever stamps if they are actual ordinary Forever issues. The old purchase price does not cap their current ordinary Forever value. If “49¢” or “50¢” is printed as the denomination, it is fixed-value postage and contributes only that amount.
Can You Save or Collect Them Instead?
Yes, but USPS postage value and collector resale value are different questions. A design can remain valid for mailing without having a collectible premium. This page does not appraise or offer to buy stamps.
When to Ask USPS Before Mailing
Ask USPS when the stamp is damaged, has an unfamiliar letter or service marking, may already have been canceled, or cannot be confidently identified from official issue information.
Read the validity guide for year-specific answers and unused postage validity for non-Forever stamps.
Sources checked August 25, 2026: USPS Forever stamp history; USPS DMM 604.