I regret to inform you that I would like to resign my post of Sales Executive. I hereby give 1 month notice of my intention to leave ABC Company with effect from [Date].
I have accepted an offer with another firm and have decided to tender my resignation. This decision was not an easy one and took a lot of consideration. However, I genuinely appreciate all your guidance and supports and it has been a pleasure working with you and representing the company.
Once again, I would like to thank you for allowing me to be a part of your team and wish ABC Company continued success in the future.