The Brazilian was spotted at the airport on Thursday, accompanied by his father.
Neymar is due to appear at the court in Barcelona’s City of Justice at 9.45am on Friday morning.
The 27-year-old insists he is owed £10.5million in loyalty bonuses by the LaLiga champions
Neymar received £12.5m from Barcelona, before he joined PSG in a world-record £200m move back in the summer of 2017.
The PSG forward now wants to be paid the rest of the £23m loyalty bonus, that was inserted into his Barcelona contract.