Employee's refusal of medical tests after long-term illness and pension entitlement constitutes a breach of employment duties.

The Supreme Court dismissed the cassation appeal filed by an employee seeking a special bonus after his employer denied it due to his absence from work. The employee had been absent for over a year due to illness, during which he acquired the right to a permanent disability pension, yet refused to undergo mandatory medical examinations. The court ruled that this refusal violated the employee's fundamental duties under labor law, thereby justifying the employer's decision to withhold the bonus. Consequently, the cassation was rejected without costs, upholding the lower court's finding that the employee's conduct breached his contractual obligations.