No will shall be proved as a lost or destroyed will, unless the same is proved to have been in existence at the time of the death of the testator or is shown to have been fraudulently destroyed in the lifetime of the testator, nor unless its provisions are clearly and distinctly proved by at least two credible witnesses. For purposes of this section, a copy of the alleged lost or destroyed will can be admitted into evidence, whether or not the copy reflects the signature or signatures appearing on the original will, if the copy is properly identified, and the court shall determine what probative value, if any, is to be assigned to such copy.
Okla. Stat. tit. 58, § 82