Notice of Service of Standard Family Law Interrogatories. Form Number. 12.930(a).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. You must indicate whether you are sending the interrogatories for original and enforcement proceedings or the interrogatories for modification proceedings. Below is a list of forms that you may download for free from our website. Additional resources include a directory of local self-help centers. Customer: I received a letter of interrogatory in aid of execution from a creditor in the mail. It's for a credit card debt. Out notice, to direct the manner for service. Fill out the Judgment Lien Certificate.