How to write a resignation letter that's effective immediately? Create an Immediate Resignation Letter without a notice period using our free printable templates.Resign with a professionally designed document. When resigning without notice, your letter should state clearly that the resignation will be effective immediately. Different states have varying rules regarding separation notices or termination letters. Resignation Letter No Notice. Customize any of these resignation letters in minutes using our free AI-powered resignation letter builder.. If you're planning to quit your job here is the compilation of the best resignation letter samples to help you easily draft your resignation letter. The Immediate (Short Notice) Resignation Letter is required when the employee needs and wants to leave the workplace immediately.