[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]:
We are sadly writing today to let you know that Aunt Louise passed away last night at her home. We are comforted in knowing that she is no longer in pain at the same time that we miss her so very much. She was truly a bright light and inspiration in all of our lives.
We are now making plans for the memorial service for Aunt Louise and will keep you informed. Thank you so much for your love toward Aunt Louise and for being there for all of us.
[Sender's first and last names]