For Visa, the merchant should require your card to be signed because a card with no signature is invalid. Other credit card companies are probably the same. >

For Visa, the merchant should require your card to be signed because a card with no signature is invalid. Other credit card companies are probably the same. > Unsigned Cards > While checking card security features, you should also make sure that the card is signed. An unsigned card is considered invalid and should not be accepted. If a customer gives you an unsigned card, the following steps must be taken: > • Check the cardholder’s ID. > Ask the cardholder for some form of official government identification, such as a driver’s license or passport. Where permissible by law, the ID serial number and expiration date should be written on the sales receipt before you complete the transaction. > • Ask the customer to sign the card. > The card should be signed within your full view, and the signature checked against the customer’s signature on the ID. A refusal to sign means the card is still invalid and cannot be accepted. > • Ask the customer for a different signed Visa card > “See ID” > Some customers write “See ID” or “Ask for ID” in the signature panel, thinking that this is a deterrent against fraud or forgery; that is, if their signature is not on the card, a fraudster will not be able to forge it. In reality, criminals often don’t take the time to practice signatures. They use cards as quickly as possible after a theft and prior to the accounts being blocked. They are actually counting on you not to look at the back of the card and compare signatures; they may even have access to counterfeit identification with a signature in their own handwriting. > In this situation, follow recommended steps listed above under Unsigned Cards. https://usa.visa.com/dam/VCOM/download/merchants/card-acceptance-guidelines-for-merchants.pdf https://usa.visa.com/dam/VCOM/download/merchants/card-accept...