(I'm in New Zealand, but I'm also interested in answers/data points from other jurisdictions)
A friend whose Intellectual Property (design patent) is being infringed engaged a lawyer who intends to write a cease and desist letter to the other party, and to send a bill to this other party for his letter!
Although it is likely the other party is aware they are infringing, my friend has not reasonably communicated with this other party asking them to stop prior to getting his lawyer involved.
I can't quite put my finger on why, but it is my distinct impression/feeling that if the other party challenges the bill, they could not be forced to pay it. Are there any rules of law around this kind of thing?