Unfortunately, at a time in most employer’s lives, an ex-employee will take off with the company’s hard-earned trade secrets. When this happens, often a simple demand letter will be enough to stop the offending activity. This cease & desist demand letter is for a company whose ex-employee is using trade secrets, such as customer lists and other confidential information, while working for a competitor. The letter should be modified for the specific facts and law at hand. A summary of each legal claim is provided for the California laws typically breached in this type of situation, such as violations related to the misappropriation of trade secrets, breach of contract, intentional interference with contractual relations and intentional interference with prospective economic advantage, and slander per se. For companies facing this type of difficulty, this demand letter can provide an effective solution to swiftly resolve the matter.