A party may use one or more interrogatories which are part of a form set of interrogatories. A party may direct written interrogatories to any other party.A copy of the interrogatories shall be served on all other parties entitled to notice. Any party serving discovery shall file a. Write the address of the party where you mailed the copy to or where you hand delivered the copy. Any party serving discovery shall file a certificate of service of discovery document. {Amended April 22, 2013}. Instead, a party serving discovery shall file a certificate of service of discovery document. If you did not use Adobe Acrobat or Reader, your computer will select a software that will allow you to fill out the forms. A party can only send 30 interrogatories.