Wis. Stat. § 140.08: Authority to refuse to perform notarial act.

(1) A notarial officer may refuse to perform a notarial act if the officer is not satisfied with respect to any of the following:

(a) That the individual executing the record is competent or has the capacity to execute the record.

(b) That the individual’s signature is knowingly and voluntarily made.

(2) A notarial officer may refuse to perform a notarial act unless refusal is prohibited by law other than this chapter.