Wisconsin Statutes Vehicles (Ch. 340 to 351) § 344.48. Forged proof

(a) Forge or, without authority, sign any notice provided for in s. 344.14 or 344.15(4), or both, to the effect that a policy or bond is in effect or, knowing or having reason to believe that the notice has been forged or signed without authority, file or offer the notice for filing; or

(b) Forge or, without authority, sign any evidence of proof of financial responsibility or, knowing or having reason to believe that such evidence has been forged or signed without authority, file or offer such evidence for filing.

(c) Sign or file the affidavit mentioned in s. 344.15(4), knowing that it contains a false statement.