Whether the appellant had to pay the disputed compulsory health-insurance premiums for 2008 and 2009.
The insurer sufficiently made it plausible that the appellant was insured during the disputed periods; the premiums were therefore due.
The appellant did not seriously dispute his affiliation since 1992 and did not show coverage with another insurer. Under compulsory insurance rules, he necessarily had insurance coverage, and nothing in the file showed unlawful billing.