A joint account is an account opened in the names of two or more people. You may open an account jointly with one other person and you may add additional joint account holders once an account is open, but no more thanthree people may have a joint account. All parties are equally liable for the account.
Each person named on the account 'owns' all the money held within it and is also responsible for any borrowing on it. That means that each person can take or spend everything in the account and each one is jointly and fully liable for all the debts on it. That's the same even if only one person uses the account.
