<prompt> Human: A few months ago my mother passed away. I dont know if hes bad at explaining things or just straight up lying. He told me earlier that my mother didnt have a will. I found that extremely surprising, knowing my mom was the organized type, but she did pass away over a short period of terminal illness 4 months. Yesterday he asked me for my SS . I asked him why and he said that he needed it so money would eventually get passed down to me. Thats all he said. Then he asked if I knew my moms SS . For the most part I trust him, but not with finances mostly because I dont think he knows what hes doing. Are there any instances where a parent would need a dependents SS . Whether hes lying or not, I wont be able to get much more information out of him--thats how he is.  <response>: You need someones SSN for all kinds of legal documents. Ive needed my wife and sons SSN for every beneficiary form on all my employment and investment accounts. Also for health insurance. I assume hes working as the executor of her estate and he needs to arrange accounts to pay off her debts then distribute her assets though as her husband, most of it becomes his by default. 