"I am so sorry for your loss. Not sure what to write in a sympathy card?Keep the letter as brief and as short as possible. May you find comfort in loving memories. My family and I were saddened to learn of (Name of deceased) death. Phrases expressing your shock and dismay are perfectly acceptable. Thank you for sharing Casey and my deepest sympathies for the tragedies of your life. Be sincere and express your feelings of sympathy. "Sorry for your loss. I know ___ meant a lot to you.