Okla. Stat. tit. 58, § 58-3005: Execution of power of attorney

A power of attorney must be signed by the principal or in the

principal's conscious presence by another individual directed by the

principal to sign the principal's name on the power of attorney. A

signature on a power of attorney is presumed to be genuine if the

principal acknowledges the signature before a notary public or other

individual authorized by law to take acknowledgments.