How do you reseal an envelope?

To reseal an envelope, first, carefully open it without tearing the paper, usually by sliding a thin tool like a knife or a credit card along the seam. Clean the adhesive area with a damp cloth or sponge to reactivate the glue. Then, press the envelope closed again securely, ensuring the edges align. For extra security, you can use tape or a sticker to reinforce the seal.