End a sympathy card by repeating the expression of sympathy and offering support or help. Sign the card with a full name or names, and be as personal and sincere as possible.
After writing the heart of the message, repeat the initial expression of feelings. For example, say "Again, I am truly sorry for the loss of your mother. I know you will miss her greatly." Or, "Please accept my heartfelt sympathy for you and your family in this sad time." Mirror the beginning of the sympathy note to express the depth of feeling for the survivor(s).
Include a message or offer of support and encouragement to finish the body of the note. If the family finds comfort in knowing people are praying for them, say "Know that our family will be praying for you and your family in the coming days." Or, say "I am praying God brings you peace and comfort in this time of great sorrow." Alternately, simply write "I will be thinking of you often in coming days." Volunteer to help if needed. Say "Please let me know if I can help you in any way" or "I am here to help you with anything you need as you deal with this loss."
End the note with a sincere closing, such as "Our deepest sympathy" or "With love and sympathy." Use a full name in the signature to avoid confusion. Write "John and Mary Smith" or "The John Smith Family."