When a big check hits your account, it can feel like instant breathing room, but the banking system does not move at the speed of your mobile app. Behind that "pending" status is a tightly regulated ...

People learn the hard way that a large check doesn't behave like a smaller deposit. The balance goes up, you make plans, and then your bank quietly blocks most of the money. That delay isn't a glitch.

Image source: Getty Images You might expect a big check to clear instantly. You put it in your account, the balance goes up, and that's that. But banks don't treat large deposits the same way they ...