O.C.G.A. § 45-4-20: Nonconforming bond to stand in place of official bond though not approved and filed.

Whenever any officer required by law to give an official bond shall act under a bond which is not payable and conditioned or not approved and filed as prescribed by law, such bond shall not be void but shall stand in the place of the official bond, subject, on its condition being broken, to all the remedies, including actions, which the persons aggrieved might have maintained on the official bond.