Texas laws prohibit requiring proof of a COVID-19 vaccine. This proof was sometimes called a "vaccine passport".
State and local governments cannot issue documentation of a person's COVID-19 vaccination status. This law is in Section 161.0085 of the Texas Health & Safety Code:
(b) A governmental entity in this state may not issue a vaccine passport, vaccine pass, or other standardized documentation to certify an individual's COVID-19 vaccination status to a third party for a purpose other than health care or otherwise publish or share any individual's COVID-19 immunization record or similar health information for a purpose other than health care.
Sec. 161.0085 also says that businesses can't require proof of vaccination from their customers:
(c) A business in this state may not require a customer to provide any documentation certifying the customer's COVID-19 vaccination or post-transmission recovery on entry to, to gain access to, or to receive service from the business.
A business who violates this law risks losing their contracts or licensure if they receive state funds or licensing. However, this statute does not prevent businesses from using other COVID-19 screening procedures.
Governor Abbott's Executive Order GA-39 previously addressed this topic.