Chances are that every online punter has missed out on a massive payout just for getting one selection wrong and while that is always going to keep happening, you can at least ensure that you get a consolation prize when it does happen again.
Start placing your combo bets at 10Bet and if your four-fold or greater accumulator has just one losing selection, they will refund your stake in full, no strings attached. Simply email the customer service at firstname.lastname@example.org if it happens, and include your bet number and magic word: COMBOCADABRA.
The offer is valid for all sporting events offered on the website and maximum cashback per betting slip is €100. Your stake is refunded in real cash and players can claim this offer up to four times per month, which should be more than enough.