Evidence that a person was or was not insured against liability is not admissible upon the issue whether the person acted negligently or otherwise wrongfully. This section does not require the exclusion of evidence of insurance against liability when offered for another purpose, such as proof of agency, ownership, or control, or bias or prejudice of a witness.
Wis. Stat. § 904.11
This section excludes evidence of insurance to pay punitive damages. City of West Allis v. WEPCO, 2001 WI App 226, 248 Wis. 2d 10, 635 N.W.2d 873, 99-2944.