Yes, NDAs are very common, but there are more and less ethical ways to use them.

A judge can decide to invalidate the contract entirely, which is what I'm suggesting would be the correct remedy in this case.

What grounds are there to void this contract that was agreed on my both parties?

	▲	jacobgold 2 hours ago \| parent [-]
		We don't have all of the facts but the contract could be voided if it was signed under duress, used to hide misconduct and prevent whistleblowing, etc.