PPI was framed to protect the borrower in case he is not able to repay the loan due to uncertain contingencies like unemployment; death etc. But many of the banks like Barclays mis-sold the policy for increasing their profit. Many of the people paid extra payments for PPI policy. Thus, if you are among one of those people then file the PPI claim for getting your hard earn money back. For filing the PPI claim you would need a few things like the copy loan agreement or the contract of credit card etc. as a prove. If you want to take expert assistance then you can visit http://www.barclays-ppi.com/.