Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. You are free to resign with thirty days notice.Check with the union and don't count on what I'm saying but the rule is give thirty days notice. I apologize for putting you and your team in an unfavorable position, but the situation needs my immediate attention. The shortnotice resignation letter format is simple and straight to the point, usually with three or four paragraphs. I am writing to acknowledge receipt of your resignation letter dated September 12, 2051. The PDF version of these forms are FILLABLE. They can be filled out electronically, then printed. (An alternative to filling out the forms. Your answers to the program's questions creates the completed forms).