Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Here are two examples of letters resigning for family or personal reasons.The first is a formal business letter, and the second is an email sample. Learn how to write a short notice resignation letter with samples. Find a solution to the challenge of resigning on short notice. Pick the perfect wording and convey the message best suited for your situation. I have decided to resign due to personal reasons that require my immediate attention. Upon Bob's resignation, I became the trustee.