Minn. Stat. § 386.31
Each county recorder shall endorse plainly upon each instrument received for record as soon as received a number consecutive, to the extent practicable, to the number affixed to the instrument next previously received and enter such number as a part of the entry relating to such instrument in all the indexes kept in the office and on the margin of the record of the instrument, and such number shall be prima facie evidence of priority of registration. If more than one instrument shall be received at the same time, by mail or other like enclosure, the recorder shall affix such number in the order directed by the sender; if no direction be given, then in the order in which the instruments actually come to the recorder.
Minn. Stat. § 386.31
(895) RL s 538; 1976 c 181 s 2; 1983 c 99 s 1; 1986 c 444; 1999 c 11 art 4 s 2; 2005 c 4 s 85; 2008 c 238 art 3 s 9