The director may, when necessary and advisable in order to secure the collection of the sales or use tax, authorize any person subject to either tax, and any retailer required or authorized to collect those taxes pursuant to the provisions of section 423.14, to file with the department a bond, issued by a surety company authorized to transact business in this state and approved by the insurance commissioner as to solvency and responsibility, in an amount as the director may fix, to secure the payment of any tax, interest, or penalties due or which may become due from such person. In lieu of a bond, securities approved by the director, in an amount which the director may prescribe, may be deposited with the department, which securities shall be kept in the custody of the department and may be sold by the director at public or private sale, without notice to the depositor, if it becomes necessary to do so in order to recover any tax, interest, or penalties due. Upon the sale, the surplus, if any, above the amounts due under this chapter shall be returned to the person who deposited the securities.