I have a quarter that has a small p where it usually goes. Then a very large p above it. I will post a pic later. The quarter is 1984. Has anyone ever seen that? Let me know! Thank you
Yes, and welcome. While possible I guess, the dozen or so "misplaced" mint marks on "modern" coins I have seen have never turned out to be anything special other than oddities due to contact with other objects. Good Luck and thanks for showing us. Don't forget that most members like to see both sides and we'll need a closeup of the mint mark area.
A "very large" letter is often a "counterstamp", something that was stamped into the coin after it left the mint. Does the large letter look like it's pushed or carved into the coin's surface, instead of rising up from the surface like the "usual" mark? We'll look for the pictures. Welcome!
Yup, counter stamp. It was put there after leaving the mint. It's damage. If you look at the reverse, you'll see a flattening from the hammer blow needed to impress the P into the coin. There is no way to tell why it was done.
Notice that all Images, Letters, Dates and Mint Marks are raised above the field. Anytime you see something incused into the field it is most likely added on after leaving the mint. Such as your incused counter stamped letter P