How to write a resignation letter that's effective immediately? Download the immediate resignation letter template (compatible with Google Docs and Word Online), or see below for more examples.I am writing to give my resignation from (company name), effective (date), two weeks from today. This resignation was a difficult decision to make. Learn how to write a resignational letter if you're quitting for personal reasons. General Purpose Resignation Letters: Date. Dear (Manager's name),. I'm sorry to leave without notice. Learn how to write a professional resignation letter with our step-by-step guide and easy to use templates. Here is a short notice resignation template you may use to assist you with writing a resignation letter.