Wis. Stat. § 770.10: Completion and filing of declaration.

In order to form the legal status of domestic partners, the individuals shall, within 30 days after the clerk issues a declaration of domestic partnership under s. 770.07 (2), complete the declaration of domestic partnership, sign the declaration, having their signatures acknowledged before a notary, and submit the declaration to the register of deeds of the county in which they reside. The register of deeds shall record the declaration and forward the original to the state registrar of vital records.