Okla. Stat. tit. 68 § 213
Where, as security for the payment of any state tax, the taxpayer has filed with the Tax Commission a bond, the Tax Commission shall, as soon as the tax has been finally determined to be due and payable, notify the taxpayer and his surety or sureties of such fact by sending to each of them, addressed to their respective post office addresses last known to the Tax Commission, a letter by registered or certified mail with return receipt requested.
If, within thirty (30) days after the mailing of such notice the amount due remains unpaid, the bond posted shall be forfeited and the Tax Commission shall proceed to collect the amount due thereunder, together with any penalties and costs incident thereto. It shall not be necessary to make the delinquent taxpayer a party to any suit that may be brought against his surety or sureties.
Okla. Stat. tit. 68, § 213