If an approved plan or any representation for implementation of the plan is intentionally and substantially misleading or false, any individual who participated in any such misrepresentation shall be subject to criminal prosecution as well as personal liability for any amount of benefits deemed by the commissioner to have been improperly paid from the fund as a result thereof. This provision for personal liability is in addition to any remedy against individual claimants for collection of overpayment of benefits if such claimants participated in or were otherwise at fault in the overpayment.