Wis. Stat. § 67.025
In any municipality, the officers charged with the negotiation and sale of its municipal obligations may, in their discretion, prior to the issuance thereof, submit to the attorney general or to an attorney employed under s. 67.10(7) a certified copy of all its proceedings preliminary to such issue, and also a printer's proof or sample of or the unsigned obligations, for examination and certification. Such attorney shall examine the proceedings and, if found regular and valid, shall execute a certificate of such examination and validity. As soon as such certificate is returned, the clerk of the municipality shall cause such certificate to be recorded. This section applies to obligations issued under ss. 59.57(2), 59.82(2) (c), 66.0621, 66.0713, 66.1103 and 66.1105(9) (b).
Wis. Stat. § 67.025
See s. 893.77 for 30-day statute of limitations on municipal obligations which have been certified by an attorney.