Minn. Stat. § 580.24
(a) If no redemption is made by the mortgagor, the mortgagor's personal representatives or assigns, the most senior creditor having a legal or equitable lien upon the mortgaged premises, or some part of it, subsequent to the foreclosed mortgage, may redeem within 14 days after the expiration of the redemption period determined under section 580.23 or 582.032, whichever is applicable; and each subsequent creditor having a lien may redeem, in the order of priority of their respective liens, within 14 days after the time allowed the prior lienholder by paying the amount required under this section. However, no creditor is entitled to redeem unless, one week or more prior to the expiration of the period allowed for redemption by the mortgagor, the creditor:
(3) after complying with clauses (1) and (2), delivers to the sheriff who conducted the foreclosure sale or the sheriff's successor in office a copy of each of the documents required to be recorded under clauses (1) and (2), with the office, date and time of filing for record stated on the first page of each document.
The sheriff shall maintain for public inspection all documents delivered to the sheriff and shall note the date of delivery on each document. The sheriff may charge a fee of $100 for the documents delivered to the sheriff relating to each lien. The sheriff shall maintain copies of documents delivered to the sheriff for a period of six months after the end of the mortgagor's redemption period.
(c) The amount required to redeem from the holder of the sheriff's certificate of sale is the amount required under section 580.23. The amount required to redeem from a creditor holding a certificate of redemption is: