Here are seven tips to consider when writing a chef resignation letter: 1. Start with a friendly but official and professional introduction.How to write a resignation letter that's effective immediately? What should I include in a personal reason resignation letter? Here are 3 examples that you can use for resignation letter as Line Cook -. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. Please be advised that I am resigning my position with immediate effect. Regards,. A resignation letter should have all the information you need to formalise your resignation set out clearly and concisely. I am writing to formally resign from my position as a Chef at Lavender Hotel. My last working day will be October31 2025.