The authorization code starting with 19 of Guangfa Credit Card is an electronic confirmation code for agreeing to consume. According to the relevant information, the authorization code of the credit card is the electronic confirmation code generated by the cardholder's consent to consumption after swiping the card at the POS to transmit the consumption information to the bank's credit card information center. The bank's computer system performs risk analysis and control on the transaction information. A code generated by the card-issuing bank from five or six numbers that is used to verify a credit card and approve it when a purchase or sale is made. A credit card authorization code is unique for each individual transaction and is used to ensure secure transactions and avoid fraud. A credit card, also called a credit card, is a credit certificate issued by a commercial bank or credit card company to consumers with qualified credit.