The Spanish Football Federation have asked state prosecutors to look into allegations of match-fixing in the Primera Liga at the end of the 2006/07 season.
The game in question is Athletic Bilbao's match against Levante which the former won 2-0 to save them from their first ever relegation from the top flight.
Levante had ensured their survival the week before and the result meant Bilbao finished a point above relegated Celta Vigo.
Over the past week a number of reports in the Spanish media, with transcripts and recordings of conversations between players and club officials, have indicated that all was not as it should be and the Spanish Football Federation (RFEF) have decided to act.
"Having heard through the media of events which could affect the purity of the sporting competition, and taking into account that the same incidents could constitute criminal activity, the Competition Committee have agreed to hand over the details which they have at their disposal regarding these events to the office of the state prosecutor," the RFEF said in a statement on their website rfef.es.
Authorities are also looking into a recent claim involving Malaga's 2-1 victory over Tenerife in the second division last season, which helped them achieve promotion instead of Real Sociedad.