When someone dies, the money sitting in a checking or savings account does not simply disappear, and the bank does not automatically hand it to the family member who seems most likely to inherit it. What happens next depends heavily on how the account gets titled, whether the owner named a beneficiary, and whether the money needs to pass through the estate. A few words on a bank form can make a surprisingly big difference, which is why the way an account gets set up while someone is alive matters so much later.
That can make the aftermath of a death confusing, especially when relatives assume a will answers every question about the money in the bank. It may not. The bank account itself can follow rules that differ from the instructions in a will, so knowing which road the money takes can save a family a lot of confusion during an already difficult time.