Okla. Stat. tit. 60, § 60-657.3: Personal property held in safe deposit box or other

safekeeping repository.

All tangible and intangible personal property held in a safe

deposit box or other safekeeping repository in this state in the

ordinary course of the holder’s business and proceeds resulting from

the sale of the property permitted by other law, which remain

unclaimed by the owner for more than five (5) years after the lease

or rental period on the box or other repository has expired, are

presumed abandoned. If a will or trust instrument is included among

the contents of a safe deposit box or other safekeeping repository

delivered to the State Treasurer, the State Treasurer shall provide

a copy of the will, trust, and any codicils or amendments to such

will or trust instrument, upon request, to a claimant or claimant's

representative who provides the State Treasurer with evidence of the

death of the testator or settlor and evidence of apparent ownership.