we have completed our iva. we were made to sign forms saying that any ppi we received would be sent to the company investigating the ppi who are connected to the company that dealt with our iva and after they had taken their 40%, the rest would be sent to the iva company. Can we be legally made to do this, we have our completion certificates
Good question and my thought is no you can't be made to sign any forms. You have your completion certificates so your IP can't threaten to not complete your IVA if you do not sign.
However you will not be able to keep any funds from a successful PPI claim as these were assets of your original IVA so you may as well comply, your IP should allow you to retain any interest that has been refunded so it may be of benefit to you to agree and sign