On 27 August 1999, C.G and T.H., appellants, gave N.B., defendant, the exclusive assignment to find a purchaser for their bungalow. The assignment had a duration of three months, with a taciturn extension of three months unless one of the parties terminated the contract by giving notice, at the latest, fifteen days before the end of the three month period.
By notice of 12 November 1999 the appellants terminated the assignment.
The defendant disputed this termination by notice of 22 November 1999 because he had received an offer to purchase the bungalow of which the validity period was not yet expired.
On 13 December 1999 the defendant sent appellants a list of persons with whom he had negotiated. On this list Mr. and Mrs. C.-D. were mentioned. The latter had offered to the defendant to purchase the bungalow and later on the bungalow was sold to them by the appellants.
In court, the agent claimed commission for the sale. The judge assigned him the requested commission, whereupon C.G. and T.H. appealed.