Supreme Court dismisses appeal; employer bears burden of proving employee knew of unjust enrichment.

The Supreme Court dismissed the plaintiff's cassation appeal against a labor court ruling that rejected the claim for return of funds. The employer argued the employee should return benefits received from discretionary bonuses, while the employee claimed she spent the money on language courses and medical expenses. The court held that the burden of proving the employee's knowledge of the illegality lies with the employer, and since the employee was not enriched, the claim failed.