Key legal question
Whether Thurgau had to recognize and help enforce Nidwalden's guardianship measures over children residing in Thurgau.
Extracted holding
No. Because the children were actually domiciled in Thurgau when the guardianship was ordered, Thurgau could subject them to its own guardianship competence and was not obliged to enforce Nidwalden's decision.
Extracted reasoning
The Court held that, absent an applicable concordat, cantonal territorial sovereignty governs guardianship jurisdiction; in conflicts of competence the canton of residence, not the home canton, is competent. Thurgau had validly withdrawn from the 1822 concordat, so that instrument no longer prevented application of the territorial principle.