A party may serve on any other party no more than 25 written interrogatories, including all discrete subparts. Contains Fields to Complete on-line (print out for filing) A form for pro se litigants (Rev.Federal Rule of Civil Procedure 33 and Local Civil Rules 33.2 and 33.3 explain the requirements for interrogatories. To whom can I direct interrogatories? State that you are requesting answers to the interrogatories under Federal Rule of Civil Procedure 33. 2. Define the terms you will use in your interrogatories. (i) Who may register. FRCP 33 permits a party to serve a set number of written interrogatories (or questions) directed to another party in the case. Under NY CPLR § 3130, to formally object to an interrogatory, you provide a written response specifying the grounds for your objection. The law says that legal papers have to be "served" (delivered) the right way.