The main discovery devices are "interrogatories, depositions, requests for admissions, and requests for production. FRCP 33 states the rules for serving interrogatories.A party must make a complete response to each interrogatory. The responding party must serve a written response on the requesting party within 30 days after service of the interrogatories. This article explains subpoenas in Texas including, who or what can be subpoenaed, how to find and file subpoena request forms, and serving subpoenas. In general, Texas has very few official legal forms. You will need to fill out and sign the document and then follow the procedure the county requires for submitting a subpoena request. In general, Texas has very few official legal forms. This is why you will not always find a free fill-in-the-blank form for your situation. A magistrate will also ensure that reasonable assistance is provided to the accused in completing forms necessary to request counsel.