[February 26, 2020]
[City], [State] 
Please accept this letter as my formal notification to you that I am resigning from my position with [Company Name].
My last day will be [March 11, 2020].
Thank you for all of the opportunities, both professional and personal, that have been provided to me while I worked at [Company Name]. If I can help in any way with this transition then please let me know as soon as possible.