N.Y.C. Admin. Code § 11-108: § 11-108 Rules in signing warrants.

No warrant shall be signed by the comptroller or countersigned by the commissioner of finance, except upon vouchers for the expenditures of the amount named therein, duly prepared and audited according to the methods prescribed by the comptroller, and filed with the comptroller, except in the case of judgments, in which case a transcript thereof shall be filed.