This is a situation that requires your mother to seek legal advice to have a proper estate plan in place as soon as possible. There are ways other than titling the bank account jointly with your sister, that still allow your sister to have her access to bank funds to pay your mother's bills, or limit her access to funds. For example, having one account with your sister as a signer on checks, that has a small balance transferred into it each month to cover bills, and the rest of the funds held in another account that is part of her living trust controlled by a Trustee who is reliable, etc. Part of an estate planning attorney's advice to your mother will consist of instructions regarding proper titling of assets such as accounts, so that they will be managed by the most qualified person (of her choosing) in the event of her death, and will pass to those she has chosen. In the majority of cases we have seen, jointly titled accounts are claimed by the surviving joint tenant upon one joint tenant's death, because joint tenant titling automatically has a "survivorship" feature- the survivors get the account. You sister could claim that by putting her on as a joint tenant to the account, your mother intended for her to have the whole account upon her passing. Then you and your other siblings would be forced to bring a court action to try to recover those funds and it will be extremely costly and ugly. These issues need to be cleared up ahead of time by your mother while she is still able to let her wishes be known. Those wishes need to be documented correctly, and consistently, with the help of an estate planning specialist.
Answered on Jun 06th, 2013 at 2:18 PM