Print the citation number on the check or money order to ensure the correct citation is credited. This article explains what demand letters are, when they are useful, and how to write them.Most courts will accept letters on 8.5 x 11 standard letter-sized paper. Enjoy our new and improved forms page! Then, explain how you know the defendant you're writing about. Learn the virtual court procedures, who you need to contact, and more about the Dallas County Courts at Law. Forms are grouped into the following categories. These include PDF format, file name character limits, and signature formatting. Gov and must be in a Word format (not PDF). You can contact the court you wish to file your small claims lawsuit in and request the forms needed to file a petition.