You don't even need to give a reason. You can simply write, "Please accept this letter as my resignation.Try to focus on a single compelling reason for your decision. Pick the perfect wording and convey the message best suited for your situation. Below are some ProTips and a sample resignation letter that you can edit based on the details of your own individual situation. State your intention to resign in one week. Provide your final day of work for greater clarity. 3. A resignation letter needs to include your contact information, official notice that you're resigning, and when your final day of work will be. No reasons are necessary. Mr Morgan has offered his resignation and it has been accepted.