Okla. Stat. tit. 60, § 60-515.1: Instruments and liens - Effectiveness

Any deed, mortgage or other instrument purporting to convey,

mortgage or encumber a unit ownership estate, or an interest in a

unit ownership estate, is effective only as to any unit in the unit

ownership estate in which the maker of such instrument owns an

interest of record at the time such conveyance or encumbrance is

received for filing by the county clerk, provided, a purchase money

mortgage shall be deemed to create a valid lien upon such of the

units described in the mortgage as are also described in the

concurrent conveyances to the mortgagor. Such instrument shall not

impair or otherwise encumber title to any interest in the unit

ownership estate not owned of record by the maker thereof at the

time of such conveyance or encumbrance.