>now my passport got a signature I won't be able to replicate ever

I'm not sure I could ever prove I am who I say I am using my signature. My wife signs my name most of the time when it's necessary for a check or a health form for the kids or whatever. Whenever I go to vote, I try to sneak a look at their copy of the form to see how I signed it when I registered. I think my credit union has one 'on file' for me, but I'm sure it's nothing like how I actually sign my name and is from ~25 years ago.