Wis. Stat. § 181.1504: Amended certificate of authority.

(1) When required. A foreign corporation authorized to transact business in this state shall obtain an amended certificate of authority from the department if the foreign corporation changes any of the following:

(a) Its corporate name or the fictitious name under which it has been issued a certificate of authority.

(b) Its date of incorporation or the period of its duration.

(c) The state or country of its incorporation.

(2) Filing and authentication requirements. The requirements of s. 181.1503 for obtaining an original certificate of authority apply to obtaining an amended certificate under this section, except that a foreign corporation is not required to deliver a certificate of status with an application solely to change a fictitious name.