Supreme Court dismisses appeal, ruling written form is mandatory for contract changes if parties stipulated it.

The Supreme Court of Poland dismissed the appellant's cassation appeal against the appellate court's decision to reject the employee's wage claim. The employee argued that the employer unilaterally reduced his salary without a written agreement, violating labor law requirements. The court held that because the employment contract explicitly required written form for any changes, the oral reduction was legally ineffective. Consequently, the court set aside the lower court's judgment and remanded the case for a new trial.