How to write a resignation letter that's effective immediately? Learn how to write a short notice resignation letter with samples.Find a solution to the challenge of resigning on short notice. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. Simple resignation letter and email message samples to use to quit a job, as well as tips for what to write and how to resign. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. I wish you both great success going forward. In the meantime, please let me know if I can assist you in any way during this transition period. Sincerely,. Please, accept this letter as a formal notification of my immediate resignation from the assistant manager position. This letter confirms my decision to resign from my teaching position at John Adams High School, effective two weeks from the date of this letter.