Texas Business and Commerce Code - BUS & COM § 505.002. Use of Zip Code to Verify Identity in Credit Card Transaction

(a) A business may require a customer who purchases a good or service from the business using a credit card to provide the customer's zip code to verify the customer's identity as provided by Subsection (b).

(b) A business that obtains a customer's zip code under Subsection (a) may electronically verify with the credit card issuer that the zip code matches any zip code that the credit card issuer has on file for the credit card.