Hi amanda and welcome to the forum
Is there any reason why this creditor was left out of your IVA proposal? If this was through a genuine mistake on your part, ask your IP to invite the missing creditor to join into the IVA proceedings.
You will probably need to make additional payments at the end of the IVA to ensure the dividend originally pledged is eventually returned, but this is better than risking the whole arrangement to a bankruptcy, where all creditors will get a lot less if anything at all.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk