Knowing how to communicate with the opposing counsel can be difficult. Learn proper email etiquette when messaging the opposing counsel.Explain the source of your evidence. Disclaimer. The following sample letters are to be used as a guide or example, and must be adjusted to suit your client's needs. An engagement letter is a formal agreement between a lawyer and client that outlines the scope and terms of the legal representation or services to be provided. Access the document template, modify it, fill it, and share it with your contributors without breaking a sweat. You were injured in a car accident and your attorney is preparing a demand letter to send to the atfault driver's insurance company. You and your opposing counsel are headed to a settlement conference with a judge. Then, according to the presiding judge and as reported in the Los Angeles Daily Journal, "all hell broke loose. In the letter, describe what is bothering you and what you need.