Okla. Stat. tit. 46, § 46-1: Absolute deed as mortgage

Every instrument purporting to be an absolute or qualified

conveyance of real estate or any interest therein, but intended to

be defeasible or as security for the payment of money, shall be

deemed a mortgage and must be recorded and foreclosed as such either

in an action to enforce the mortgage or pursuant to a power of sale

as provided for in the Oklahoma Power of Sale Mortgage Foreclosure

Act.