Bonds of a municipality shall be signed by two or more officers of the municipality holding office at the time of such signing, one of which officers shall be the mayor or other chief executive officer, and the corporate seal of such municipality shall be affixed to the bonds. Interest coupons attached to bonds may bear a facsimile signature of one or both of said officers. The delivery of bonds so executed shall be valid notwithstanding any changes in officers or in the seal of the municipality after the signing and sealing of the bonds.
Ala. Code § 11-81-63 (1975)