The two men were acquitted almost three years ago, but the Swiss Attorney General's Office and FIFA appealed against the decision.
The UN High Commissioner for Human Rights, Volker Türk, has pledged to ensure proper labour standards during tournament preparations, which will heavily rely on migrant workers.
An unpublished report into the soccer governing body’s responsibility for migrant workers recommends that it should compensate those harmed.
The international match calendar is now oversaturated and puts the players' welfare at risk, national football bodies say.