Each bond or other evidence of indebtedness shall contain on its face a statement specifying the purpose for which the bond is issued. An officer of the City who uses the proceeds of any bond for any other purpose shall be charged with misconduct in office. All bonds and other evidence of indebtedness issued by the City shall be signed by the Mayor and countersigned by the Clerk-Treasurer, under the seal of the City. Interest coupons may be executed with the facsimile signatures of the Mayor and Clerk-Treasurer. The Clerk-Treasurer shall maintain a complete and detailed record of all bonds and other evidences of indebtedness issued by the City. When any bond or other evidence of indebtedness is paid, the Clerk-Treasurer shall mark it “Canceled.”