As a customer, you would have the option of setting these thresholds. If you have a deposit account, and you want to be notified when your balance goes to $500 or $200 or $50, you would be able to set that. Once the threshold is reached, you would get a notice by the electronic means of your choice. That would tell you the threshold has been met or exceeded, that you may incur fees and the steps you could take to avoid such fees going forward.
On November 5th, 2018. See this statement in context.