Hi jb and welcome to the forum
It is quite usual during the first few months of an IVA for your IP to be paid for the work they have done leading up to the IVA, and as this is with the agreement of creditors I do not think that this should be of concern. From an IP's perspective, it is entirely fair that the nominee be paid the fee you agreed to pay them, and creditors will get their money in due course.
What has led to you missing payments? And do you feel able to continue with the IVA?
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
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http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp