Key legal question
Whether the cantonal court had to join A.________ as a co-liable third party
Extracted holding
Yes. A.________ was a person against whom the compensation fund had also asserted liability, so he had to be joined.
Extracted reasoning
Joinder is required for other co-liable persons already pursued by the compensation fund; hearing them can affect the legal position of the remaining defendants, and a remand was not futile because A.________'s statement and possible further payments could still influence the allocation of liability.