Chrysi Avgi (Golden Dawn) spokesman Ilias Kasidiaris is due to go on trial on Monday, when he will have to respond to accusations that he was an accomplice in the mugging of a student.
Kasidiaris has been charged with driving the car that carried five men who beat and stabbed a student outside the Athens University halls of residence in 2007 before stealing the victimís identity card.
A witness gave police the license plate of the getaway car, which matched that of Kasidiarisís vehicle.
The spokesman for the far-right party denies taking part in the attack and claims that he was at the Metropolitan Hospital at the time, where he was representing the pharmaceutical company he worked for.
The trial had been due to start on Wednesday but the judge did not have time to hear the case.