Wis. Stat. § 186.03: Use of name exclusive.

(1) Limits. A person may not use a name containing the phrase “credit union”, represent itself as a credit union or conduct business as a credit union unless the person is any of the following:

(a) A credit union.

(b) An association of credit unions.

(c) An organization, association or corporation whose membership or ownership is primarily confined or restricted to credit unions.

(2) Use required. A credit union shall use the phrase “credit union” in its corporate name.

(3) Name approval. The office of credit unions shall approve a credit union’s name before the name is officially adopted. A credit union may not adopt the name of another credit union doing business in this state.

(4) Penalty. Whoever violates this section may be fined not more than $5,000.