The gross proceeds derived from sales of goods, wares, merchandise, and telecommunications services by vendors, for resale, to persons having a valid sales tax permit who are regularly engaged in reselling the articles or services purchased are exempt from sales tax. If the purchaser is an Oklahoma resident, he must provide the vendor with his Oklahoma sales tax permit number if the sale is made in Oklahoma. In addition to furnishing his sales tax permit number to the vendor, the purchaser must certify in writing to the vendor that said purchaser is engaged in the business of reselling the articles purchased. Failure to so certify, or to falsely certify, with the knowledge that the items purchased are not for resale, shall be sufficient grounds upon which the Commission may cause the purchaser's sales tax permit to be canceled. The seller will be held liable for sales tax due on any sales where an exemption certificate is found to be invalid, for whatever reason. [See: 68 O.S. § 1365(G) ]
Okla. Admin. Code § 710:65-13-200