A signature on a durable power of attorney that purports to be the signature of the principal or of another adult directed by the principal as authorized by Section 751.0021(a)(2) is presumed to be genuine, and the durable power of attorney is presumed to have been executed under Section 751.0021(a) if the officer taking the acknowledgment has complied with the requirements of Section 121.004(b), Civil Practice and Remedies Code.
Tex. Estates § 751.0022