This set provides coverage of every aspect of probate law and estate and trust administration in Texas. It includes sample forms and letters.In this blog post, we'll delve into what a letter of instruction is, why it's essential, and how to craft one with finesse and ease. On this page, you should fill in the location that the document is to be filed with, either the trial court or the Court of Appeals. Quickly learn what a Letter of Instruction is and how to write one (2024 updated). Plus, grab the free template so you can take action! Sample request letters. Business letter format. This guide includes forms and instructions for a letter and affidavit to request that the court register an outofstate custody order in Texas. The Harris County Clerk's office is happy to help you file documents or locate records, but we cannot answer legal questions.