Wis. Stat. § 701.1010: Limitation on personal liability of trustee.

(1) Except as otherwise provided in the contract, a trustee is not personally liable on a contract properly entered into in the trustee’s fiduciary capacity in the course of administering the trust if the trustee in the contract disclosed the fiduciary capacity.

(2) A trustee is personally liable for torts committed in the course of administering a trust, or for obligations arising from ownership or control of trust property, including liability for violation of environmental law, only if the trustee is personally at fault.