The defendant, an operator of a letter delivery service, installed 52 red mailboxes in the city of Nuernberg. The mailboxes had a similar form to the mailboxes of the plaintiff and carried the inscription "Brief24" (Letter24).
Up to 1998 the only letter delivery service was the German Federal Post (Deutsche Bundespost) due to a state monopoly. The mailboxes of the privately owned company "Deutsche Post AG" - which emerged from the Deutsche Bundespost through privatization - are yellow.
In the past, letters which should have been delivered by the plaintiff have been inserted into the defendant's mailboxes which resulted in a delay of two to four days. The red mailboxes of the defendant were regularly installed close to the yellow mailboxes of the plaintiff.
The plaintiff requested the defendant to cease-and-desist from installing its mailboxes close to the ones of the plaintiff.