Key legal question
Whether suing Karoline Bollag in Aargau instead of Zurich violated the constitutional venue guarantee of the home domicile.
Extracted holding
Yes. She had her fixed domicile in Zurich, the claim was personal in nature, and Art. 59(1) BV required suit at that domicile; solidarity with other Aargau residents did not remove that protection.
Extracted reasoning
The Zurich registration certificate showed domicile in Zurich. The plaintiff did not dispute that domicile. For personal claims, the home-domicile guarantee applies, including for solidary debtors; therefore the Aargau forum was improper.