Okla. Stat. tit. 60, § 60-657.4: Intangible property - Presumption of abandonment

A. All intangible property, including but not limited to

securities, principal, interest, dividends or other earnings

thereon, less any lawful charges, held by a business association,

federal, state or local government or governmental subdivision,

agency or entity, or any other person or entity, regardless of where

the holder may be found, if the owner has not claimed such property

or corresponded in writing with the holder concerning the property

within three (3) years after the date prescribed for payment or

delivery by the issuer, unless the holder is a state that has taken

custody pursuant to its own unclaimed property laws, in which case

no additional period of holding beyond that of such state is

necessary hereunder, is presumed abandoned and subject to the

custody of this state as unclaimed property if:

1. The last-known address of the owner is unknown; and

2. The person or entity originating or issuing the intangible

property is in this state or any political subdivision of this

state, or is incorporated, organized, created or otherwise located

in this state.

B. The provisions of subsection A of this section shall not

apply to property which is or may be presumed abandoned and subject

to the custody of this state pursuant to any other provision of law

containing a dormancy period different than that prescribed in

subsection A of this section.

C. The provisions of subsection A of this section shall apply

to all property held at the time of the effective date of this act,

or at any time thereafter, regardless of when such property became

or becomes presumptively abandoned.