letter of termination is also known as a notice of termination, a letter of dismissal, or a termination notice. While there is no legal duty to produce or deliver a termination letter, a thorough and detailed termination letter might help avoid a situation in which a former employee claims they were fired without reason or knowledge.Although a termination letter is not a remedy against a wrongful termination case, it can be used as proof that the employee was terminated for a lawful reason if it gives grounds for the removal from the employment.