We have now reached the point where you will need to exit from your organization. Please write a letter of resignation to your group. In your responses, show some grace and kindness. Acknowledge contributions, admirable attributes, or just offer kind words for the future to your group members. Writing a resignation letter and acknowledging the contribution of others are often overlooked, yet these elements of communication can leave a lasting impression.
Business News Daily and Forbes provide excellent examples and advice.
https://www.businessnewsdaily.com/8975-sample-resignation-letter.html
https://www.forbes.com/sites/dailymuse/2014/10/28/how-to-write-a-resignation-letter/#41bb19e66ffc
The organization you will write about: Wendys