Keep it simple and straight
It’s crucial that you keep your resignation to the point without overdoing or making it flowery. There’s no need to sugar coat or get creative in the beginning; you need to state the position you’re resigning from and the effective date. Since you must have probably shared with your boss your reasons for leaving, you don’t need to describe them here—keeping it simple, crisp and formal is perfectly fine.
Express your gratitude
Expressing your thank you’s to your boss in the resignation leaves a good impression and can help you in future as well. Also, it’s always a good idea to thank your employer for the opportunity, describing some of the key things you’ve enjoyed and learned on the job. Leaving things on a good note will leave a lasting and positive impression.
Show responsible behaviour until the end
Giving your best while you are in the company is a quality that you will be remembered for a long time. You can add a few lines in the letter stating your willingness to help out with the transition in your resignation. Ending things on a smooth and successful manner should be the ideal way to bid goodbye!