An ideal time to let them know about your resignation is after you give your two weeks' notice and understand the details of the transition process. What It Takes to Write A Great Resignation Letter.Create the perfect resignation letter in 30 seconds with our free AI resignation letter generator. You don't need to hire a resignation letter professional. The date you are leaving (if at all possible, give at least two week's notice). Include a forwarding address for mail and correspondence. I apologize for the short notice. I've enjoyed working on the customer service team and have learned much during my tenure with the company. Please accept this as my formal resignation from my position as a Marketing Assistant. Is it wrong to send your letter of resignation to your boss via email?