Dear [Supervisor's Name],
Please accept this letter as formal notification of my resignation from my position as [Your Job Title] with [Company Name]. My last day of employment will be [Your Last Working Day, typically two weeks from the date of the letter].
I sincerely appreciate the opportunities for professional and personal development that you have provided me during my time with the company. I have truly enjoyed working for [Company Name] and value the experience I have gained here.
Thank you for your support and guidance. I wish the company continued success in the future.
Sincerely,
[Your Full Name]
[Date]