The first sign of trouble is rarely a letter. It’s the embarrassment of a declined debit card at the grocery store, then a notice on your banking app that the account is closed. No accusation. No phone call. Often no reason you can use.
The lack of information isn’t a glitch. Banks run automated systems built to spot fraud and money laundering, and those systems sometimes flag legitimate behavior — cash deposits, a burst of Venmo payments, a personal account used for a side job. If the alerts pile up, the safer move for the bank is often to exit the customer. If a Suspicious Activity Report (SAR) is in the file, federal law forbids the bank from telling you that. Even when it is not, the account agreement usually lets them close you out “for business reasons.”