All warrants and checks of the city shall bear the signature of the city treasurer or the deputy city treasurer or the city clerk and the finance director or the city manager or the city clerk. One of the required signatures may be affixed by stamping or otherwise placing a facsimile of such signature thereon. (Ord. 599U § 1, 2006; Ord. 593 § 1, 2004; Ord. 476 § 8; Ord. 396 §§ 1, 7. 2002 Code § 2-5.5).