Opening a bank account is no guarantee that it will remain open. Here's when a bank may consider closing your account.If you have a bank or credit union account, there's no guarantee that it will always be available to you -- particularly if you fail to follow bank policies. In fact, banks have a responsibility to monitor accounts to ensure that they (the bank) can't be accused of being complicit in criminal activity.There are four distinct reasons a bank may close your account. 1. Your account is inactiveW ...