However, players that lost their bet would need to bet again if they were to recover their stake – a factor that led to three complaints being registered with the ASA.

In response, Unibet said the wording of the offer was “commonly used” in the gambling industry and players would be familiar with such an offer.

In a statement, the ASA said: “Unibet explained that it was not the case that six unique bets were required to be placed as part of the turnover, but rather the subsequent bet placed in and with the turnover must be six times in value of the refunded stake.

“We noted that consumers were required to place the first bet with their own money after the registration for a new account as the first condition of the offer and their winnings could be withdrawn in cash if they had won the first bet,” the ASA said.

“Although consumers would not be required to wager further money of their own during the turnover process if they had lost the first bet, they would be required to use the returned bonus to place further bets in order to qualify for the withdrawal of the stake refunded as cash.”

The ASA ruled that the adverts must not appear again in their current format and that Unibet should not use the claim ‘risk-free’ to describe this offer in other ads, also warning the operator to make clear all material information and significant conditions in future ads.