How to Write an Immediate Letter of Resignation (4 steps). How to write a resignation letter that's effective immediately?Use a one week notice letter template to inform your current employer that you plan to resign within seven days. Pick the perfect wording and convey the message best suited for your situation. In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started. The purpose of this message is to inform you that I am resigning my position at EvilCorp. Looking to resign with a Immediate Notice Resignation Letter? Use our resignation letter template for notice-period roles. Bro just hand a basic resignation letter in and tell your direct line manager what you think of him. They don't care neither should you.