These forms and instructions are available in the General Clerk's Office, Room 108, in the Nassau County. Petition for (Custody) (Visitation).You want to: ➢File an answer, waiver of service or counterpetition in an active existing case. This article tells you how to file an answer in a family law case (such as a divorce, custody, paternity, or modification case). Forms; For Attorneys. File Your Petition and Forms. File your Petition and forms at the district clerk's office in the county where the child or children live. Customer: In a child custody case in Travis county Texas, I want step-by-step instructions on what to do after I have filed my motion with the district clerk. Download or obtain forms: Get the required forms from the Florida State Courts website or your local courthouse. Many forms in Texas are not available in a fill-in-the-blank format.