Interrogatories. Written questions about things that are relevant, or important, to the case. A party can serve another party with up to 50 interrogatories.Interrogatories (MN). Summary. These template interrogatories are for discovery between parties in civil actions in Minnesota district court. Each Side may serve no more than 45 interrogatories, including all discrete sub-parts. Third-Party Practice. A party may serve on any other party no more than 25 written interrogatories, including all discrete subparts. In addition, parties cannot get around the. When discovery is PERSONALLY served, the responding party has 30 days from date of service to respond. In general, the same limitations on discovery found in a judicial proceeding apply to an administrative contested case.