Joint account is an account shared between two persons, which are mostly relatives, couples, or business partners who have a level of familiarity and trust with each other.
Joint accounts can cause problems, however, because they generally provide all parties unlimited access to the funds. Thus, if one spouse has difficulty controlling their spending habits, this may affect the other spouse, who may be more frugal. The frugal spouse cannot challenge the withdrawals or transactions of the other spouse with the bank because they are listed as a joint account holder.
Another thing to keep in mind with joint accounts is that all parties with access are responsible for any and all fees and charges.