Bendtner raised his shirt and lowered the top of his shorts slightly, revealing the name of a betting firm across the top of his underpants, after scoring his second goal in a 3-2 loss against Portugal last Wednesday.
The laws of soccer also state players "must not reveal undergarments showing slogans or advertising."
Bendtner was also separately disciplined by the Danish Football Association for flouting team policy. The association has official ties to a rival gambling company.
Denmark was eliminated from Euro 2012 after losing to Germany, 2-1.
Meanwhile, Spain and Italy advanced to the quarterfinals after winning their final group matches. Defending champion Spain sealed the top spot in Group C by beating Croatia, 1-0, with a late goal by substitute Jesus Navas. Croatia's football association faces a UEFA charge on Tuesday over its fans' racist abuse of Italy forward Mario Balotelli last week. Balotelli came off the bench to score Italy's second goal in a 2-0 victory against Ireland, lifting the Azzurri above Croatia in the standings.
In other soccer news:
* Abby Wambach and Alex Morgan each scored twice to give the United States a 4-1 win over Japan in Halmstad, Sweden, in its penultimate tuneup for the Olympics. The United States next plays June 30 vs. Canada in Sandy, Utah, before going to London.
Sport Stops *
R.C. Owens, a longtime 49ers front office man and 8-year NFL wide receiver whose impressive leaping ability earned him the nickname "Alley Oop" and helped popularize the phrase, has died. He was 78.
* Greek and Serbian Olympic officials denied they were involved in selling tickets to the London Games on the black market. The IOC is investigating allegations in Britain's Sunday Times that officials and ticket agents in several countries were caught selling tickets for up to 10 times face value. At issue are ticket allocations given by organizers to the 205 national Olympic committees to sell in their home countries.
* Ohio State is paying football coach Urban Meyer a minimum of $4 million annually and detailing in the contract what he's required to do if an NCAA rules violation occurs under his watch. The university completed details of Meyer's contract and released it on Monday. Meyer was hired last November to rebuild the program, which got a 1-year bowl ban for NCAA rules violations under former coach Jim Tressel, who was forced out because he didn't tell anyone that he received a tip about some players violating NCAA rules.
* San Jose Sharks general manager Doug Wilson announced that Todd McLellan will return for his fifth season as coach.