Well-versed in IP litigation, Morten Petersenn advises on the field of trademarks, designs, copyrights and false advertisement claims. 

Clients often ask Morten questions like "How do we best stop the infringement?", "How fast can we get a court order to stop the infringement", "Can we obtain a preliminary injunction?", "Is it possible to obtain a court order with EU-wide scope?", "Shall we send a cease and desist letter?", or "Can we obtain damages?". However, Morten does not only litigate for claimant parties. He also handles defense cases. Clients who are attacked by a competitor would typically need advice on questions like "Can we file a protective brief with the court?" or "Can we file a counter-claim?". For his clients, Morten is both a counsel and a litigator in court. 

Morten's key area lies in the field of the internet. He often advises on conflicts related to online shops or online marketing, such as domain name conflicts, fake websites, non-compliance of websites or mobile advertisement with regulatory rules.

Morten has a large number of clients from the fashion and luxury industry as well as manufacturers and distributors of consumer products. For example, Morten has represented clients in parallel import cases of textile products originating outside the EU. He also often litigates cases involving counterfeits or lookalike products from competitors. He represents clients in unfair competition cases, often regarding misleading statements or comparative advertising. 

Morten has been lecturing "IP litigation" in LL.M. Master Courses at Bucerius Law School in Hamburg.

Best Lawyers has been ranking Morten as an expert in the field of IPMT for a number of years. Similarly, the German JUVE handbook has been quoting Morten as "frequently recommended" for various years in a row.