Can i use 2015 stamps on 2019 mail

In the United States, the United States Postal Service (USPS) allows the use of postage stamps with a denomination that is equal to or greater than the current First-Class Mail letter rate.

As of 2019, the First-Class Mail letter rate is $0.55. If you have 2015 stamps with a denomination of $0.49 or higher, you can use them on 2019 mail.

However, if you have 2015 stamps with a denomination of $0.48 or lower, you will need to add additional postage to bring the total to $0.55 or more.

Here are some examples:

It's always a good idea to check the current postage rates and the denomination of your stamps before mailing a letter. You can find the current postage rates on the USPS website or at your local post office.