Thank you for all of the professional opportunities I have received during my service at (company name). I wish you and the company continued success. Regards,.Master the art of writing a resignation letter with our comprehensive guide, offering step-by-step instructions, tips, and templates. Writing that you're resigning for "personal reasons" is sufficient. A resignation letter is a formal notice stating your intention to leave your job. It typically includes details like your last day and potential next steps. A resignation letter provides notice that you will leave a company. "If you are going to resign from your position, it needs to be in writing. I wish you and the company success in the future. Both Elledge and Hayashi pointed out that you don't have to put in a reason for your resignation, but if you want to, you absolutely can.