Resign for Medical Reasons
Dear Mr./Ms. Manager?s Name
I am sorry to say that because of my current condition, I will no longer be able to continue working with Company Name. As you know I have been ill for some time and my doctors have advised to take complete bed rest.
Therefore circumstances require that I resign my position as Position Title effective Date of Resignation.
The medical certificate is enclosed herewith.
I thank you for your support, guidance and encouragement during my time at company name.