Okla. Stat. tit. 84, § 917

A. A non-testamentary estate planning document or a signature on a non-testamentary estate planning document may not be denied legal effect or enforceability solely because it is in electronic form. B. If other laws of this state require a non-testamentary estate planning document to be in writing, an electronic record of the document shall satisfy such requirement. C. If other laws of this state require a signature on a non- testamentary estate planning document, an electronic signature shall satisfy such requirement.