Things You'll Need
Instructions
Tear the corner of the envelope off where the stamp is located. Leave a small margin of paper around the entire stamp. Handle it by the paper surrounding the edges.
Place an inch of very warm water into a pan. Turn the canceled stamp upside down and put it into the water. Allow it to soak for a few minutes. The glue on newer, self-adhesive stamps will take longer to loosen than the older gummed ones.
Use a pair of stamp tongs to remove the stamp from the water. If it's still attached to the envelope, put it back in the water and let it soak a few minutes longer.
Remove the canceled stamp from the water. Carefully place it between two paper towels, according to shop.usps.com. Place a book on top of it to flatten it out. Let the stamp dry overnight.