Both possibilities involve leaving your job; however, there are some benefits you're entitled to get when you retire instead of resigning. A letter of resignation is not mandatory and notifying your employer of your intent to tender you resignation definitely isn't necessary.A notice of intent to retire on a specific date is essentially a resignation letter. A resignation implies future activity. Friends, colleagues, and students will want to know what is next for me. I am writing to formally announce my retirement from my position as Senior Marketing Manager with BluWave, effective April 30, 2050. This guide tells you what you need to know while filing a claim. We recommend that you read through the guide at the beginning of your claim. We'll cover how to write a retirement letter, including a stepbystep guide, a sample letter and frequently asked questions.