I travel a lot between the US and Europe and the cultures are very different: In the US I have my real signature at the back of the card but I just draw a stra

I travel a lot between the US and Europe and the cultures are very different: In the US I have my real signature at the back of the card but I just draw a straight line when signing the receipt. No one ever complained about that. In Europe I sign with my real signature (because I know that cashiers there are more strict) and even then sometimes hear complaints that the signature on the receipt doesn't exactly match the one on the card.