When I booked the hotel online, I asked for the bank card verification code, saying it was on the back of the card, with three or four digits in italics, but why didn't I have an agricultural bank car

When I booked the hotel online, I asked for the bank card verification code, saying it was on the back of the card, with three or four digits in italics, but why didn't I have an agricultural bank card? This code is CVV2 code. You need a credit card, but there is no savings card. In addition, don't tell others about the code changes at will.

① CVV2 is the number printed in the signature area of Visa/MasterCard card;

② 3 digits after the credit card number;

③ The last three digits usually seen on the back of a credit card are CVV 2；;

After the credit card is replaced, even if the card number is the same, the CVV2 code behind it will change. It is just like the ID card of a credit card, so it must be kept well.

⑤ You can find a sticker to stick it up to avoid being stolen by others when swiping the card.