Key legal question
Whether the Luzern courts had jurisdiction despite Heuer's claim that he no longer had domicile or business domicile in Sursee when suit was filed.
Extracted holding
Jurisdiction in Sursee was valid because the parties had agreed to a contractual forum there.
Extracted reasoning
A waiver of the constitutional domicile forum is permissible. The later closure of the branch is irrelevant once a valid contractual forum has been established.