When did you finish paying? Does your company know about your inheritance? If not they can come back about that.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
They can and will ask whatever they need to know until such time as they are ready to issue you with the completion certificate --- until that time you are still in an IVA and bound by the responsibilities therein, regardless of early payment.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014