For purposes of this article, the person, firm, or corporation discharging the duties of county treasurer shall be deemed to be the county treasurer. All rights, powers, duties, responsibilities, and legal and equitable obligations and liabilities placed on county treasurers by this article shall apply with equal force and effect to those persons, firms, or corporations which perform or discharge the duties of county treasurers under the law in the several counties of this state.
OCGA § 15-21-53