Hi Aditi,
Check, maybe this one helps you.
Date: 30th June 2010
To,
Mr. Ajay
Dear Ajay,
Subject: Relieving Order
This is to acknowledge the receipt of your resignation letter dated 17th June 2010. While accepting the same, we thank you very much for the close association you had with us during the tenure from 26th April 2010 to 30th June 2010. You have been relieved from your service with effect from the closing working hours of 30th June 2010. We wish you all the best in your future career.
For ______________
Authorized Signatory