Minn. Stat. § 517.16: IMMATERIAL IRREGULARITY OF OFFICIATING PERSON DOES NOT VOID.

A civil marriage solemnized before a person professing to be lawfully authorized to do so shall not be adjudged to be void, nor shall its validity be in any way affected, on account of a want of jurisdiction or authority in the supposed officer or person, if the civil marriage is consummated with the full belief on the part of the persons so married, or either of them, that they have been lawfully joined in civil marriage.