As online bookmakers vie for each others share of punters most of them are offering free bets for new sign ups.  You know the sort of thing "bet £25, receive a free £25 bet" as a bonus when opening an account.  This is great news as, using a technique called “matched betting”, it is possible to back and lay an event in order to win regardless of the outcome. Simply by using the free bets / bonuses that are on offer as your stake money and then laying these bets off to make risk free profit.