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. Sample resignation letter format with immediate effect. Resignation acceptance letter with immediate effect word format. This Easy Form helps you resign as an agent for power of attorney. It works for property or health care powers of attorney. Looking to resign with a 24 Hours Notice Resignation Letter? Use our resignation letter template for notice-period roles. The employee should make sure to include their name, current job position, a brief explanation of why they are resigning, and what date their last day will be.