It varies by IP and also depends on the exact wording to the agreement. Historically you have beenstill liable to hand over windfalls before the formal completion of the arrangement as many final agreements have merely been a freeze on payments until formal completion ( the issue of the certificate ). However, some IPs will regard the final payment per the early ending agreement as the line in the sand.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk