Wis. Stat. § 846.165
No sale on a judgment of mortgage foreclosure shall be confirmed unless 5 days' notice has been given to all parties that have appeared in the action. Such notice shall be given either personally or by registered mail directed to the last-known post-office address, mailed at least 5 days prior to the date when the motion for confirmation is to be heard, if any post-office address is known; if not known, mailing may be dispensed with but an affidavit shall be filed with the court stating that the address is not known, and the notice shall state, in addition to other matter required by law, the amount of the judgment, the amount realized upon the sale, the amount for which personal judgment will be sought against the several parties naming them, and the time and place of hearing.
Wis. Stat. § 846.165
The purchaser at a foreclosure sale has a right to notice of when the sale has been confirmed, when the mortgagor's redemption period ends, and when the 10-day payment period under s. 846.17 [now s. 846.16(2m) (b)] expires. GMAC Mortgage Corp. v. Gisvold, 215 Wis. 2d 459, 572 N.W.2d 466 (1998), 96-1663. This section does not preclude a purchaser from obtaining a confirmation hearing when the mortgagee's application for confirmation has been withdrawn. This affords the purchaser an opportunity to have the court decide whether it is entitled to transfer of the property under applicable law, and does not undermine the rights of the lienholders and mortgagor to object to certification as provided by law. JP Morgan Chase Bank, NA v. Green, 2008 WI App 78, 311 Wis. 2d 715, 753 N.W.2d 536, 07-1753. The notice referred to throughout sub. (1) [now this section] is the notice of the first sentence that must be given to all parties that have appeared in the action. There is no requirement that when no party is entitled to personal notice under sub. (1) [now this section] there must be a general posting or publication of notice. There is no general hearing requirement or general motion-for-confirmation requirement that applies when no notice of hearing is required. Wells Fargo Bank, N.A. v. Biba, 2010 WI App 140, 329 Wis. 2d 787, 793 N.W.2d 95, 09-2273.