Official Comments
 Article #  

(Obligor’s additional costs)

The obligor has a right to be compensated by the assignor or the assignee for any additional costs caused by the assignment.

Official Comment
 1. Compensation for additional costs

The assignment of a right does not necessarily affect the obligor’s rights and obligations. However, should the obligor bear additional costs due to the fact that performance has to be rendered to the assignee instead of the original obligee, this Article entitles the obligor to require due compensation.


1. Company X is obliged to reimburse a loan of EUR 1,000,000 to company A. Both companies are located in country M. A assigns its right to company B, located in country N. X has a right to be compensated for the additional costs involved in what has now become an international transfer.

The rule laid down in this Article is in conformity with Article 6.1.6, which provides a similar solution if a party to the contract changes its place of business after the conclusion of the contract.

2. Compensation by the assignor or the assignee

The obligor may claim compensation for additional costs either from the assignor or from the assignee. In the case of a monetary obligation, the obligor will often be in a position to set off its right to compensation against the obligation it owes to the assignee.

3. Partial assignment

Additional costs may arise in particular in the case of partial assignment (see Article 9.1.4). This Article applies accordingly.


2. In Illustration 2 to Article 9.1.4, A has assigned to B part of its right to receive a delivery of steel from X. Instead of having to deliver 1,000 tons to A, X became obliged to deliver 700 tons to A and 300 tons to B. X is entitled to be compensated for the additional costs resulting from having to deliver in two parts.

4. Obligation becoming significantly more burdensome

In two cases compensation for additional costs is not considered to be a sufficient remedy. Firstly, under Article 9.1.3 the assignment of a right to a non-monetary performance is not allowed when it would render the obligation significantly more burdensome. Secondly, under Article 9.1.4 the partial assignment of a right to a non-monetary performance is also not allowed in similar circumstances.