How to write a resignation letter that's effective immediately? Start with the facts and be direct.Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. I am writing to formally inform you of my decision to resign from my position at Wilson Co. as Sales Manager. Acts 1985, 69th Leg. Resigning is one of the final steps in the process of accepting a new job. Retirement to their immediate supervisor at least two weeks prior to the effective date of termination. A civil service system generally means employment in government with such positions filled on merit as a result of a competitive examination or screening.