It is not necessary to aver the capacity of a party to sue or be sued, the authority of a party to sue or be sued in a representative capacity, or the legal existence of a partnership or an organized association of persons that is made a party. A party who desires to raise an issue as to the legal existence of any party, the capacity of any party to sue or be sued, or the authority of a party to sue or be sued in a representative capacity shall do so by specific negative averment, which shall include such supporting particulars as are peculiarly within the pleader's knowledge.
Minn. R. Civ. P. 9.01