The Danish Gambling Authority has upped its efforts to fight illegal online gambling sites by issuing a blacklist of unlicensed operators, the regulatory authority has announced on its website.

Denmark on January 1, 2012, opened up its national market to foreign operators by introducing a new licensing system. Since then, some 40 operators have obtained licenses to offer legal online gambling in the nation.

A number of unlicensed operators however continue to offer their games to Danish gamblers, and the Gambling Authority has now issued the blacklist to force them out of the market.

The list includes 12 operators, including bet-at-home.com, casinoredvegas.com, coolhandpoker.com and titanpoker.com.

Internet service prover HI3G has at the same time been ordered to block its clients from accessing the illegal site through a court order.

HI3G will now have 14 days to carry out the block, while other ISPs are expecting to follow suit shortly after receiving notice of the illegal activities.

The blacklisted operators have also received a warning with the demand to leave the Danish market immediately. If they fail to comply, they will face hefty fines and legal prosecution.

The method is similar to the one adopted by Belgian authorities, who issued a list of 30 blacklisted operators last month.

The list included a number of big operators like Bwin, Betsson, Betfair, William Hill and 888, who will now face blocking by Belgian Internet service providers in the near future.