Medical certificate justifies absence; direct submission to ZUS is lawful when employer reports anonymously.

The Supreme Court dismissed the cassation appeal against a labor court ruling that rejected an employee's request to return to work. The employee had submitted medical certificates directly to the Social Insurance Institution (ZUS) after failing to deliver them to her employer, who reported staff anonymously. The court held that such direct submission complies with the Social Benefits Act and does not constitute a breach of the employee's duty to justify absence. Consequently, the lower court's decision upholding the employer's right to terminate the probationary contract was confirmed as legally sound.