I do not know the details, so I can speculate only. A lawsuit may yet happen if that is the only way to free up the money. However, a lawsuit is expensive and t

I do not know the details, so I can speculate only. A lawsuit may yet happen if that is the only way to free up the money. However, a lawsuit is expensive and time consuming, so it is probably not the best place to start. Also, I don't believe the bank has any obligation to do business with a customer, so the most you could hope for would be to free up the funds. I believe the author would prefer to continue to be able to bank unimpeded (and switching banks won't help as the problem will follow unless and until it is cleared up). Finally, the bank has a pretty good defense. They are required by law to impose the sanctions, so prudence requires them to act first and ask questions later.