Almost 4,000 borrowers are due a share of £1.7 million after CashEuroNet UK LLC, trading as QuickQuid and Pounds to Pocket, lent some customers more than they could afford to repay.
Tens of thousands of Erudio customers will begin to have interest applied to their loans after it was initially frozen last year following an investigation into historic paperwork issues.
Thousands of West Bromwich mortgage customers are due a share of £2 million after the building society admitted it had charged too much interest on some accounts nearly a decade ago.
Nationwide has revamped its FlexDirect current account to include an interest-free overdraft for a year and 5% in-credit interest on balances up to £2,500 for the same period.