My father in law paid his registration but cannot find the new registration and car sticker. Can I bring in a signed form into AAA to pick up the new registration and 2021 sticker?

AAA does provide registration services including license plates, just call your local office and explain the particulars of your situation they will be glad to help.

TONY YES YOU CAN. I had to do the exact same thing I paid for my tags online for the DMV on the DMV website Qaited 45 days for it to arrive and it never did I went to AAA she was able to look up to see that I paid for it on the DMV SITE. I had to sign a form and she gave me my tag.

For a fee

I don't know. Maybe call them.