Many friends may think that the credit card number is raised just for beauty or good feeling. In fact, this convex design has a history!

The bulge on the credit card number was originally used for rubbing. This information is called EMBOSERDATA because the early POS machines (not called POS at that time) can only use the card protrusion information on carbon paper such as blue printed paper as your credit card voucher to confirm the transaction. So with these prominent information, we can confirm the identity of the user → complete the transaction → form a document.

Until today, in some special circumstances, the convex design on the credit card can still come in handy. For example, a netizen said that when he was diving in the Great Barrier Reef, there was no network and POS machine on board, so he could only pay by rubbing his credit card number.

Second, the "dotted line" on the UnionPay logo is not a dotted line.

As shown in the figure below, what seems to be a dotted line in UnionPay logo is actually not a dotted line, but a message composed of miniature characters. The miniature characters include: the Chinese phonetic abbreviation of UnionPay, the code of the issuing bank (including the Postal Savings and Exchange Bureau), the card code and the manufacturer code. And need to be arranged in the above order.

But generally speaking, these words need a holographic magnifying glass to see clearly, which is difficult for ordinary users to see with the naked eye.

Third, there is a big difference between a co-branded card and an identification card.

Many small partners are confused by various co-branded cards and recognition cards, and they are stupid and confused. It's actually quite simple. Co-branded cards are usually for-profit organizations, such as China Southern Airlines Co-branded Card and Shangchao Co-branded Card.

The partner of the subscription card is usually a non-profit or non-profit organization, such as Baidu Post Bar subscription card. , often just to attract a specific user group, and most of the card rights are online rights.