A certificate of service of the interrogatories must be filed, giving the date of service and the name of the party to whom they were directed. This form should be used to ask the other party in your case to answer certain standard questions in writing.Subsection (b) requires both parties to appear before the Court. It is normal to to only efile the notice of service of interrogatories and send the actual interrogatories to the relevant party directly. Interrogatories are written questions that either the defense or the plaintiff involved in litigation can send to the opposing attorney. Interrogatories may be served on the plaintiff anytime after the action commences and upon any other party with or after the service of process. The answers to the following questions are intended to supplement the information provided in the. A sample notice of serving interrogatories used to prove service of interrogatories in a Florida circuit court civil case.