Every genuine bookmaker has an inside team of professionals to look out for "abnormal betting behavior" and have the betting risk management market under control. This is when unusually large amounts of money are punted, or when the betting pattern is heavily skewed towards one side. This is a tell-tale sign that something may be going on. So the bookmakers have to take measures to prevent themselves from falling victims to match-fixers. The first thing they usually do is to lower the odds and then to raise the bookie margin. Sometimes the bookies might limit the maximum stake to a smaller amount than they usually accept for that particular league. There are positions when some of them stopped accepting bets anymore on specific games, especially on games from the lower leagues in many countries at the end of the football season.