Use one of our resignation letter templates. The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates."A resignation letter should be short and to the point. Simply explain why you're leaving and the date of your departure. Who should receive my resignation letter? You should give your letter of resignation to your immediate supervisor. This manual is designed to assist hiring managers with appropriate hiring processes and Human Resources practices. One resignation letter sample is designed to be concise. Once completed, note the SST number and come into our office to finish the process. No officer or employee, while holding a position in the unclassified service, shall be assigned to or occupy any classified position.