Okla. Stat. tit. 68, § 5016

In addition to the penalties provided in the Uniform Tax Procedure Code, any person who knowingly and willfully files a claim for sales tax relief to which such person is not entitled or who knowingly and willfully furnishes any false or fraudulent information to the Tax Commission pursuant to the provisions of the Sales Tax Relief Act, shall be subject to a penalty equal to the amount of the relief claimed. In addition to such penalty, such person shall repay to the Tax Commission any amount of sales tax relief granted pursuant to such claim.