Not really.
The reality with regard to windfalls/inheritances, is that it is very unlikely that the IP will ever find out if you have received one. Therefore, this aspect of personal insolvency very much relies upon the integrity of the individual concerned, as the IP will trust his or her client to be honest at all stages of the game.
Of course if your relatives are aware that you are entering into an IVA, there is nothing to stop them amending the terms of their will - but this should not be done by your instigation.
My best advice is honesty is the best policy. You will come out the other side a better person, with no guilty feelings that your creditors have been cheated out of money they were rightly entitled to receive - and after all you did borrow the money with the integrity that you meant to pay it back!
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
View my IVA blog at:
http://melaniegiles.blogs.iva.co.uk