Football fixed matches are generally orchestrated by a network of players, coaches, referees, officials, and other individuals who all share an interest in the outcome of the game being modified. Through this network they may arrange for money to exchange hands, or for some degree of favoritism in the officiating and outcome of games. Collusion among team members, referees, and/or officials can occur to manipulate the outcome of a match.
This can involve players performing poorly or deliberately conceding goals, such referees awarding dubious penalties or disallowing legitimate goals, or officials ignoring fouls or cautioning players which should be sent off. In some cases, the referees and officials in charge of the matches may have been instructed to fix the result of a match in exchange for money or some other kind of reward. This could involve the referees giving out fewer cards in certain situations or awarding decisions in favor of one team over the other.
The team who is attempting to fix the match will then attempt to maximize the chances of their desired result through various tactics, such as intimidating referees into certain decisions, or having players fake injuries to waste time. In other cases, teams may collaborate with betting syndicates to fix matches. This could involve bribes or manipulating the odds for the match so that people betting on the fixed match will be guaranteed to win. This can result in large profits for the people involved in fixing the matches.