Wis. Stat. § 770.17: Fees to county clerk.

Each county clerk shall receive as a fee for each declaration of domestic partnership issued and for each certificate of termination of domestic partnership issued the same amount that the clerk receives for issuing a marriage license under s. 765.15. Of the amount that the clerk receives under this section, the clerk shall pay into the state treasury the same amount that the clerk pays into the state treasury from the fee collected for issuing a marriage license. The remainder shall become a part of the funds of the county.