Polish Supreme Court dismissed cassation against social security contributions for business associates, ruling they are not covered by mandatory insurance. The court held that the law excludes employees from business owner insurance, and procedural defects did not justify reversal. The decision clarifies that one co-party cannot appeal on behalf of another in social security disputes.

The Supreme Court dismissed the cassation appeal filed by Paweł S. against a social security office decision requiring him to pay contributions for his business associates, Piotr and Dariusz S. The lower courts had ruled that these individuals were not covered by mandatory business owner insurance because they were employees under a labor contract, not collaborators. The Supreme Court rejected the claim that the law should be interpreted broadly to include employees, citing specific statutory exclusions, and found no valid procedural grounds for overturning the first-instance judgment.