Fill out the online form: You'll need to provide some basic information, such as your name, address, and Social Security number. The primary purpose of a letter of credit is to diminish the possibility that a party does not repay a financial obligation.San Antonio Debt Lawsuit Attorney Advises South Central Texas Clients. Firm defends residents of the San Antonio-New Braunfels metropolitan area. You want to answer and deny the claims. You can get a copy from the court clerk on file. In general, Texas has very few official legal forms. Do I need an attorney to write a demand letter? You do not need an attorney to write a letter. A San Antonio letter of intent lawyer could ensure all transaction terms are clearly spelled out upfront.