Okla. Stat. tit. 14A, § 1-201A
With respect to a consumer credit sale or consumer loan to which this Code does not otherwise apply by reason of Section 14A-1-201, if, pursuant to a solicitation relating to a consumer credit sale or loan received in this state, a person who is a resident of this state sends a signed writing evidencing the obligation or offer of the person to a creditor in another state, and the person receives the goods or services purchased or the cash proceeds of the loan in this state:
Laws 1975, SB 351, c. 129, § 1, emerg. eff. May 13, 1975.