Polish Supreme Court ruled that any business activity during sick leave causes loss of sick pay under Art. 17 Social Insurance Act.

The Supreme Court dismissed the applicant's cassation appeal against a lower court decision denying him sick pay. The applicant, unable to work due to illness, continued running a medical equipment repair business and personally signed over 1,000 documents for it. The court held that any human activity aimed at earning income, including business operations, constitutes 'wage-earning work' under Article 17 of the Social Benefits Act, thereby invalidating the sick leave entitlement.