👉 A lettercard is a type of credit card that allows users to make purchases without having to enter their personal information or credentials. It typically includes features such as cashback programs, rewards points, and exclusive offers. Users are granted access to these benefits by using the card's PIN or password. The term "lettercard" was coined in the early 20th century, and it has since become a popular and widely used term for credit cards that allow users to use their credit card without revealing
