<prompt> Human: So my sister 25 and I 30 are home for the Thanksgiving weekend NY and he offhandedly mentioned that he wants us to sign some tax forms for the custodial brokerage accounts that have been in our names since we were small kids. I have no idea how much is in these accounts, what type of accounts they are, nor have I ever seen a statement, although I have been vaguely aware of their existence for years. Not sure if the this next part is relevant, but my parents though married and cohabitating, have been rocky for a long time and there is mutual distrust between them especially with regards to finances. In fact, my mother specifically warned my sis and I against signing anything regarding these accounts. My sister is actually concerned that if our father doesnt get our signatures, he will forge them.My question is, what should I do? Are there tax implications or financial liabilities I may be unaware of? Should I take a more active role in uncovering the specifics of these accounts and prevent access to them by my father? I feel that my father is of the mindset that the money in these account were and always have been his and he was using them as a tax shield. I dont necessarily disagree with that, but I do object if hes doing something sneaky behind my mothers back.Assistant: Why not get the answers to all the questions you asked from your father?Start with the account statements.Human: It will probably come to this. Just want to be prepared for the upcoming conversation. Parental pressure still has a hold even at 30 yo! Also, he tends to throw temper tantrums when he doesnt get his way  <response>: These accounts have belonged to you since you were 18. You need to get busy understanding them and take control of your own assets. If he has asked you to sign anything you do not understand then I would not trust him one inch. It sounds like he is trying to get control of something that belongs to you.Be proactive and do what you should have done years ago. 