Form Interrogatories are a list of questions on a court form. You complete a Certificate of Service or Proof of Service form that describes how and when you served the papers.It helps if you fill in the top part of the form with the case and court information. A party must disclose to the other parties the information, documents and witnesses that support the party's claims and defenses. Step-by-Step Instructions. This article's purpose is to provide a guide for properly responding (and objecting) to interrogatories and production requests under the Texas. Historical Background of Federal Rules' Approach to Discovery: This paper would examine the treatment of information disclosure before the adoption of the. Interrogatories are a comparatively inexpensive form of discovery. Access the Exhibit,Appendix in the Susquehanna Salt Lake, LLC v. Gordineer, Douglas S. case on Trellis.Law.