To write a simple resignation letter effective immediately, follow these steps:

1. Write the date first, specifying when you plan to leave the organization.
2. Explain only the necessities.
3. Remain professional.
4. Include your contact information.
5. Be grateful for the opportunity.
6. Proofread your letter.
7. Make copies and hand-deliver the letters. ^{indeed.com 1}

Here's an example: "I regret to inform you that I am resigning from my position as [Job Title] at [Company Name], effective immediately. Due to unforeseen circumstances, I must step down from my position immediately". ^{resumeviking.com 2 3 4 5}