[Your letterhead, if desired; if not, your return address]

[Date of letter-month, day, and year]

[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]

Dear [recipient's name]:

I am writing to express my most heartfelt thanks to you for being such a compassionate and competent caregiver for my mother during the time that she has been recovering from surgery and other illnesses. It is so difficult to see her going through these health challenges but such a reassurance to know that someone like you is looking after her needs so closely.

As always, please let me know whenever you have questions or need to provide me with medical updates about my mother. I will also be sure to keep you informed on anything that you need to know. I truly value our communication and our ability to work together as a team on my mother's behalf. Thank you again so very much for everything you do.

Sincerely,

[Signature]

[Sender's first and last names]