As long as you do not remove the stamp from the original envelope it doesn't matter that it's post marked. If it's possible, just fix the addresses on he original envelope and place back out in your mail box or a blue collection box.

Noooo, ugh what a pain. I'm sorry 😕 @amonakiej

@hladybug, they post marked the stamp so I have to get new stamps and envelope at first I was just gonna use white out but I can't

:( i would cry

Can you get blank address labels (like the sticker kind) and just redo the addresses?