Around two years ago I made a Logo for a friend that started Business1 with two friends. The logo that I made has been used by Business1 for two years since. I was never paid for this work and I never signed a contract with Business1 to complete and hand over the work. It was a favour for a friend. Move forward and my friend has had a falling out with the other two Business1 partners. My friend is going to start Business2 and is getting paid out of Business1. However, Business1 is still using the logo that I created. So my question is, can I ask Business1 to stop using the logo that I created? Or have they been using it for too long and now own copyright? Disclaimer - I am doing this to be a pain more than looking to get paid (which wouldn't be a bad outcome). So, yes, this is petty, but any help would be greatly appreciated as Business1 owners have not been very civil in the break up of the company with my friend... Thanks heaps for your help!