No warrant for the payment of any claim shall be issued by the Finance Director unless there is an available appropriation sufficient to cover the payment and the Finance Director is satisfied that the same is in proper form, correctly computed, and that the claim is legally due and payable. The Finance Director and his or her sureties shall be liable to the City for all loss or damage sustained by the City by reason of the corrupt approval of such claim against the City, and the Finance Director shall have the power to require that the amount claimed is justly due, and is in conformity with the law and ordinances, and may summon any officer or employee and examine him or her for that purpose.