Forever stamps are a type of postage stamp that is issued by the United States Postal Service (USPS). These stamps are designed to maintain their full value for mailing a first-class letter, regardless of any future price increases. So, if you buy a Forever stamp today, you can use it to mail a letter at any time in the future, even if the cost of postage goes up.

The concept of Forever stamps was introduced by the USPS in 2007, in response to a rising trend in the price of postage. At the time, the USPS was increasing the price of stamps every year or two, and this was causing confusion for many customers who had a stockpile of old stamps that were no longer valid for mailing. The introduction of Forever stamps was a way to simplify the process of buying and using postage, and to ensure that customers could always use their stamps regardless of future price changes.
The question of whether Forever stamps expire is one that many people have asked over the years. The short answer is no, Forever stamps do not expire. As long as they are used to mail a first-class letter, they will maintain their full value regardless of any future price increases. However, there are some important details to keep in mind when it comes to using Forever stamps.
Firstly, it is worth noting that Forever stamps are only valid for first-class mail. This means that if you need to mail a package or use a different type of mail service, you may need to use additional postage or a different type of stamp. Additionally, if you use a Forever stamp on a letter that is not first-class mail, you will need to add additional postage to make up the difference in cost.
Another important consideration is that Forever stamps may not always be the best option for postage. While they are convenient and can be used at any time in the future, they are not always the most cost-effective choice. For example, if you know that the cost of postage is likely to increase significantly in the near future, it may be more cost-effective to buy stamps at the current price rather than relying on Forever stamps that may not cover the full cost of postage in the future.
In addition to these considerations, it is also important to be aware of the potential for counterfeit or fake Forever stamps. While the USPS takes steps to prevent counterfeiting, there have been instances where counterfeit Forever stamps have been sold to unsuspecting customers. To ensure that you are using genuine Forever stamps, it is recommended to buy them directly from the USPS or from a trusted retailer.
Overall, Forever stamps are a convenient and flexible option for sending first-class mail. While they do not expire and can be used at any time in the future, it is important to keep in mind the limitations of using Forever stamps for other types of mail, and to consider the potential for counterfeit or fake stamps. By staying informed and making smart choices about postage, you can ensure that your mail always reaches its destination on time and at the correct postage rate.