Social security benefits denied due to missing medical certificate proving inability to work on specific date.

The Supreme Court dismissed the cassation appeal filed by an insured individual against a lower court's denial of sick pay. The insured argued that the lower court erred by refusing to appoint an expert to determine if his illnesses were the same, while the Social Security Institution contended that a medical certificate is the sole proof of inability to work. The court ruled that the specific fact of illness continuity was legally irrelevant because the insured lacked a certificate proving inability to work on the critical date, thus breaking the legal chain for benefits.