Supreme Court dismisses appeal; anniversary bonus criteria based on work duration, not document proof, violates wage setting principles.

The Supreme Court dismissed the cassation appeal filed by an employee against a Polish television company regarding a denied anniversary bonus. The employee argued that requiring a specific work certificate to validate prior employment periods constituted discriminatory treatment and violated equal pay principles. The court ruled that while the bonus is based on total work duration, the employer's requirement to prove this duration solely through a work certificate violates the statutory principles for determining wages, as it arbitrarily excludes valid proof methods.