In Texas, a complete Advance Directive requires the completion of two separate forms: a Living Will termed a "Directive to Physicians and Family or Surrogates" and a "Medical Power of Attorney" (a.k.a. Health Care Proxy).

Required Information for a Last Will and Testament: Your TX Living Will must be signed by you and two (2) witnesses for it to be considered valid. One (2) of the witnesses CANNOT be:

• The individual selected as the document's agent who is related by blood or marriage to the principal.
• Entitlement to any portion of the main's estate upon the death of the principle.
• On the principal's death, the attending physician or an employee of the attending physician have a claim against any portion of the principal's inheritance.
• Participating in the provision of direct patient care to the principal OR an officer, director, partner, or business office employee of the health care facility OR of any parent organization of the health care facility

(Via Texas Health & Human Services Commission)

Information Required for Naming a Health Care Proxy: Your TX Health Care Proxy form must be signed by you and two (2) witnesses for it to be declared valid. One (2) of the witnesses CANNOT be:

• The person nominated as Agent (Proxy) for the document who is related by blood or marriage to the principal.
• Entitlement to any portion of the main's estate upon the death of the principle.
• The principal's attending physician or an employee of the attending physician
• Possess a claim against any portion of the deceased principal's inheritance.
• Participating in the provision of direct patient care to the principal OR an officer, director, partner, or business office employee of the health care facility OR of any parent organization of the health care facility