How to write a resignation letter that's effective immediately? Here are steps you can take to still quit properly when you're unable to give notice, including sample resignation letters to send your boss.To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude. Download New York Immediate Letter Of Resignation template, modify and send for signing using BoloForms Signature. I have accepted a new role as (job title) at (company name). This sets the tone and leaves no room for ambiguity. 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 notice of my resignation from my position as Sr. IT Engineer or (your designation). My last day of employment will be (date).