A party may serve on any other party no more than 25 written interrogatories, including all discrete subparts. Whenever any legal papers are served, the person serving the papers must fill out a written form that says how the papers were served.All documents required to be served on a party or intervenor shall be filed either before service or within a reasonable time after service. Describe in detail "the extensive factual and economic support for. Any party may serve upon any other party no more than 25 written interrogatories, including all discrete subparts. However, both when the interrogatories and answers are served, the party serving them shall file with the court a certificate of service. All forms are ADA accessible, and you can handwrite or type into the PDF form to fill it out. Suggestions? Appellate Court Forms. Before you fill out the forms to file your claim answer these questions (each is explained in this booklet):. (a). In federal civil litigation, interrogatories are written questions that must be answered in writing under oath.