Picture reference: eps/images/pic_eps_02 Credit card authorization number, which in English can be called "Approval Code" or "Authorization Code". The authorization number for MasterCard, VISA, and JCB credit cards is generally six digits (six numbers, or a combination of English letters and numbers). The authorization number for American Express credit cards is generally two digits. The authorization number for Diners Club's letter of credit is generally four digits. Image reference: banking.h *** cpersonal/card/chip/images/slip

Reference: Experience of leonlee_g