How often do they even check it though? And of those times, how often would they refuse it? I know that pre-chip and PIN in the UK I had a card for years where

How often do they even check it though? And of those times, how often would they refuse it? I know that pre-chip and PIN in the UK I had a card for years where the signature strip had been rubbed off, and I was never challenged on it. When I've visited the US they've also very rarely checked.