Kernrechtsfrage
Whether the assignment of a partial claim complied with Art. 165 OR despite limited description of the underlying claim.
Extrahierter Entscheid
The assignment was invalid because the transferred partial claim was neither sufficiently specified nor objectively determinable from the deed.
Extrahierte Begründung
For written assignments, the deed must identify the transferred claim well enough for third parties to recognize which claim is assigned. Here, the agreement did not identify the relevant contract by date or content, did not show whether the claim was contractual performance or damages, and did not specify which damage items were transferred. A later unilateral clarification in the proceedings could not cure the defect.