The general rule if you are in an IVA is that if you receive a windfall, it has to be paid into your IVA in addition to your ongoing monthly repayments. Normally claim payouts for miss-selling etc fall into the windfall catagory. You should certainly speak to your IP and tell them about what you have received and why.
It doesn't really matter what the background facts of this are - the payment is a windfall and needs to be disclosed to your IP and paid over for the benefit of creditors.
