I think a lot of people on here are dubious about the firms offering assistance in reclaiming PPI or bank charges.
Ultimately, as said above, the IP is only doing a job in ensuring the creditors get as much returned to them as possible and if this means asking for money back from banks etc. then this is what they will do.
What has gone wrong in this process is the IP's have worked on the basis people in IVA's are not bright enough to do this themselves (given we have all proved we have a problem with organising our own finances hence being here in the first place they may have a point

)and have secured the services of third parties who tend to use aggressive tactics to secure the rights to reclaim the money due to the large fees they can charge - this also tends to p**s off people in IVA's..
The easiest solution is for everyone to write themselves to their own banks / credit card companies and make the claim themselves, this will ensure all monies go back into the IVA - which the IP has to agree is good and keeps everyone in control of the situation so alleviates the stress..
Given that this is such a big thing at present its a shame the forum has not done a section covering how this can be done and posting template letters for anyone to use..