define billing zip code

define billing zip code Define billing ZIP code as the postal code associated with the address linked to a credit or debit card. It’s used to verify transactions and prevent fraud, particularly during online or phone purchases. When the billing ZIP code entered doesn’t match the card issuer’s records, the transaction may be declined. Billing ZIP codes are essential for AVS (Address Verification System) checks and are separate from shipping ZIP codes. Always enter the exact code registered with your bank to avoid payment issues.