English to French Law/Patents Law (general)

appearing in the following sentence:
"In the event that your client fails to provide the undertaking or to pay the legal costs which our client seeks, our client will commence legal action against your client in court, as he considers appropriate, without further notice, including for the avoidance of doubt, the issue of legal proceedings seeking (amongst other things):"
Where the person is seeking compensatory payment for his legal costs in regards to a legal action he took to prevent infringement of his trade marks