A resignation letter is a form that gives notice to an entity or organization of an employee's intent to quit their job. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own.We're going to make it easy and break down everything you need to know about resignation letters in this article. Petition for Resignation of Guardian of a Minor. The drop- down windows of the AFROTC Form 53. 12.3.3. Specific instructions for completing the AFROTC Form 53 are contained on the website. 12.3.4.