[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
My family would like to thank you most sincerely fordonating to the memorial fund that we set up to honor our beloved aunt who passed away last month. Your donation makes such a difference and is so encouraging to us.
Thank you again for your kindness and generosity. I'm sure we will talk with you soon.
[Sender's first and last names]