This resignation letter sample provides your employer with a letter for your file and also suggests that you've done everything you can to remain professional. Here is a short notice resignation template you may use to assist you with writing a resignation letter.I am writing to inform you that I will be resigning from my current position, X at X, effective immediately. Please accept this letter as formal notice. How to Write an Immediate Letter of Resignation? Due to unforeseen personal reasons, I am unable to provide any notice. Practice to wait until you've secured a new role before you leave your current one to avoid employment gaps. Use a business letter format: Since an Immediate Resignation Letter is formal, you need to use official business formatting. For employers with up to.