HannahI am so deeply sorry for the loss of that childyour lossyou lost her, too. Acknowledge the loss.The kindest thing you can do is simply say 'I am so very sorry for your loss.' or 'Please accept my most sincere condolences on your loss.' Keep the letter as brief and as short as possible. Examples of what to write in a sympathy card include: The loss of a child is a pain that no words or actions can heal. I am so sorry for your loss. " "I can't imagine what your family must be going through. Be sincere and express your feelings of sympathy. I was very upset to hear of your loss. The Beneficiary must complete the Beneficiary Claim Form in full and return it to you.