I've watched while my wife, at a Thai bank, is told by the cashier at the counter "I'm sorry, your signature doesn't match close enough, it should look like thi

I've watched while my wife, at a Thai bank, is told by the cashier at the counter "I'm sorry, your signature doesn't match close enough, it should look like this <shows signature-on-file> can you try it again?" when filling in a withdrawal slip for 200K (about $7K USD). I had something similar years ago in Australia. I went into a branch, my signature had changed a LOT, and I couldn't match the old one. So they promptly updated my signature on file, based purely on the fact that I had my card and knew the pin (I don't even remember showing them my ID).