I've never done that, but I did misplace two items for years:
I had a 1965 Topps Lou Brock PSA 8. It fell into a gap between a piece of furniture and a wall that was maybe a millimeter wider than the holder. When i moved it, I found the card.
I also bought a certified auto of Brian May (
Queen lead guitarist, in case you don't know) which went missing. Drove me nuts. I was cleaning out a closet and found an envelope with COAs for various items in it. I went through it and found that I had inadvertently tucked the autograph in with the LOA and put both into the COA envelope. Brian's auto is now in the album with Jimmy Page, Eddie Van Halen, and Alex Lifeson (my personal guitarists' Mount Rushmore).
BTW, how is Jimmy Page 80????? If he's 80, I must be nearly 60??? That can't be right. My passport may say 58 but
I'm 25.