Acknowledge the loss. I love you, and I'm sending my condolences.My family and I are so sorry for your loss. Keep the letter as brief and as short as possible. "I'm so sorry for your loss, what was your mom like? " It turns out, she had lost her dad some months before and really got it. I am so sorry for your loss. " "I can't imagine what your family must be going through. "At some point in our lives, we know our loved ones will leave us. It's a part of life.