Okla. Stat. tit. 46 § 17
Every mortgage, deed of trust, and instruments supplementary thereto or amendatory thereof, or satisfaction thereof, covering any real or personal property situated in this state, made to secure the payment of bonds or notes issued or to be issued thereafter by any corporation which is an interstate gas pipeline company, or by any public service corporation, as defined in Section 34, Article IX of the Constitution of Oklahoma, or by any rural water, gas or sewer district organized pursuant to Sections 1324.1 through 1324.26 of Title 82 of the Oklahoma Statutes, or by any nonprofit rural water, gas or sewer company organized pursuant to Sections 851 through 864 of Title 18 of the Oklahoma Statutes, or by any public trust created under the laws of this state for water, sewer or gas purposes where a municipality or county is the beneficiary thereof, and every mortgage, deed of trust, and instruments supplementary thereto or amendatory thereof, or satisfaction thereof, covering any real or personal property situated in this state made to secure any indebtedness incurred under the Rural Electrification Act of 1936, as amended (U.S. Code, Title 7, Chapter 31), shall be executed and acknowledged in the same manner as are conveyances of real estate and shall be filed in the Office of the Secretary of State, who shall endorse thereon his certificate specifying the day and hour of the instrument's receipt and filing, which shall be evidence of such facts. Any description of personal or real property in such mortgage shall be sufficient whether or not it is specific if it reasonably identifies what is described and interests in real property created by an instrument previously recorded in the office of a county clerk of this state may be incorporated therein by reference. Except as hereinafter provided filing of such instrument in the Office of the Secretary of State shall be notice to all subsequent purchasers and encumbrancers of the rights and interests of the parties thereto as to property described in the filed instrument and property acquired subsequent to the execution thereof if the instrument so provides and except as hereinafter provided no other filing of any such instrument shall be necessary, notwithstanding the provisions of any other statute. Provided that in order to impart notice as to real property, instruments issued by a rural water, gas or sewer district, a nonprofit rural water, gas or sewer company or a public trust created for water, sewer or gas purposes where a municipality or county is the beneficiary, must be filed in the office of the county clerk of the county wherein the real property is located, as well as in the Office of the Secretary of State. Any such mortgage, deed of trust, and instruments supplementary thereto or amendatory thereof, heretofore recorded or filed in the office of county clerk of any county in this state may be refiled in the Office of the Secretary of State in the manner above provided and such refiling shall thereafter as to any property not previously released from such mortgage or deed of trust be of the same effect as if the instrument had been originally filed in said Office of the Secretary of State.
The Secretary of State shall charge and collect a fee of Twenty-five Dollars ($25.00) for each mortgage, deed of trust, or instrument amendatory or supplementary thereto, that is filed, or refiled, and for every instrument of satisfaction for said mortgage, deed of trust, or instrument amendatory or supplementary thereto, that is filed, in the Office of the Secretary of State pursuant to the provisions of this section. This fee shall include other fees payable to the Secretary of State as provided for by law for such filings.
Okla. Stat. tit. 46, § 17