Can unsigned credit cards be accepted as a form of payment at USPS?

Unsigned credit cards cannot be accepted as a form of payment at USPS because it is a security measure designed to protect both the cardholder and the merchant. When a credit card is signed, it verifies that the person using the card is the legitimate cardholder, which helps prevent fraud. An unsigned card raises concerns about the identity of the person presenting it, making it a potential risk for unauthorized use. This policy ensures that all transactions are secure and legitimate, maintaining the integrity of the payment process.

The other options suggest scenarios where an unsigned card might be accepted, but these do not align with the security protocols in place to mitigate the risk of fraud.