PPI stands for payment protection insurance, which is insurance sold by financial institutions to protect borrowers if they lose their job or become ill. The document discusses how to check if you have PPI on loans or credit cards, how to check how much you can claim back if it was mis-sold, and the process for filing a claim through iSmart, a company that assists with PPI refund claims. iSmart will check your accounts for free to see if you had PPI and help submit claims if you were mis-sold the insurance. There is no time limit on submitting PPI mis-selling claims as long as misrepresentation can be proven.