Art. 145 PILA from 2022

Art. 145 II. Transfer of claims
1 The assignment of a claim by contract is governed by the law chosen by the parties or, in the absence of such choice, by the law applicable to the assigned claim. A choice of law cannot be asserted against the debtor without the latter’s assent.
2 A choice of law relating to the assignment of an employee’s claim is valid only to the extent that Article 121 paragraph 3 allows it for the employment contract.
3 The form of an assignment is governed exclusively by the law applicable to the assignment contract.
4 Issues concerning exclusively the relationship between the parties to the assignment contract are governed by the law applicable to the legal relationship underlying the assignment.
Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.