Key legal question
Whether the labor court had subject-matter jurisdiction over the employer's counterclaim for unjust enrichment based on mistaken overpayment of sickness benefits.
Extracted holding
Yes. A counterclaim is within labor-court jurisdiction when it is rooted in the employment relationship; here, the repayment claim depends first on the scope of the parties' contractual and collective-agreement obligations.
Extracted reasoning
Sections 1 and 20 of the Labor Courts Act are not limited to strict contractual claims. In a dispute over whether the employer was obliged under the employment contract or applicable collective agreement to make the payments, the court must interpret the employment arrangement first. The alleged enrichment can therefore be examined as part of a typical employment dispute about salary continuation during illness.