Brazil's FIFA member Ricardo Teixeira is expected to lodge an appeal in the Swiss federal court this week to try to prevent the now-infamous ISL file being published.
The court action by Teixeira means that FIFA's plans to publish the file, which names FIFA executives who took kickbacks from World Cup television deals from now-defunct marketing firm ISL, could be delayed for as long as six months.
FIFA president Sepp Blatter initially said he would publish the court document last month, but this was delayed to February due to legal action by Teixeira in a court in the Swiss canton of Zug.
Now sources in Zurich have told Press Association Sport that a fresh appeal to the higher federal court is to be submitted this week, leading to the likelihood of a further delay that could extend to the summer.
In 2010, Teixeira was named by BBC Panorama, along with the former FIFA president Joao Havelange - Teixeira's former father-in-law - plus Paraguay's Nicolas Leoz and Cameroon's Issa Hayatou as having received payments from ISL.
Teixeira's position as head of Brazilian football and the 2014 World Cup organising committee is under threat, and he is also under investigation by prosecutors in Brazil as part of a probe into alleged tax and money-laundering offences.
Havelange, 95, resigned from the International Olympic Committee last month after 48 years, a week before the IOC's ethics committee was due to announce their findings on the case.
The IOC's ethics committee dropped the case as Havelange is no longer under their jurisdiction.
Hayatou, a FIFA vice-president and president of the Confederation of African Football, was issued with a reprimand. Lamine Diack, the president of the International Association of Athletics Federations (IAAF), was given a warning.
