How to write a resignation letter that's effective immediately? 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.Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document. Resignation Letter No Notice. Customize any of these resignation letters in minutes using our free AI-powered resignation letter builder.. Use this resignation letter example to inform your employer that you need to resign immediately and will not be able to give two weeks' notice. For either Resignation or Retirement, you will be completing and submitting the Form-100. Click on the link to complete a Form-100.