It depends on what the payment covers in particular - some IPs insist it is used to enhance the iva payment to creditors whilst others don't. Your iva terms and conditions may outline their expectation - if not chevk direct with your IP.
Good luck and let us know how you get on.
Sharing from experiences of dealing with debt
There is a solution for everyone .... Just need to stay positive !
Generally, though not always, a payment for pain and suffering is treated the same way as it is in bankruptcy in that you will be allowed to keep it. However, not all firms think this way and some will treat it as a windfall and will draw it into the IVA for the benefit of creditors.
If your IP is of the former opinion then, yes, you could use it towards a full and final offer.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014