Copyright settlement for street artist Stik
12 August 2014 Last updated at 10:20 BST
The street artist Stik has reached a settlement with a company which used his piece Stick Thief in an advert without his permission.
"I hadn't given permission for it to be used but suddenly my image was all over the advert," he told BBC Radio 4's Today programme.
"I had resources to hire legal support and my representative wrote a very stern letter to the company who had made the advert."
Gilane Tawadros, chief executive of the Design and Artists Copyright Society, said that "just because somebody has made a work in the public domain, it doesn't mean that other people have the right to reuse it or exploit it commercially."
First broadcast on BBC Radio 4's Today programme Tuesday 12 August.