The verification process typically involves several steps:
Card Number Validation: The system checks if the card number is correctly formatted and valid using the Luhn algorithm. Security Code (CVV) Check: The CVV (Card Verification Value) is verified to ensure the card is physically present. Address Verification Service (AVS): This step involves matching the billing address provided by the customer with the one on file with the issuing bank. Authorization: The bank authorizes the transaction by verifying that the card has sufficient funds and is not flagged for fraud.