I had a situation recently re: re-using content I had written for a client as a freelance/contract writer. I had written and submitted an article for them as part of the contract. Never got any feedback from them as to whether they accepted/rejected it. Then they ended the contract for their own business reasons. About a month later, I decided to re-use the article for a content site. The client got wind of it and requested a refund for the time I’d billed them for writing/submitting the article for their contract. Long story short – it was my bad. At the time, I didn’t realize I was making such grave error. After some research, I decided to refund their payment – mainly because I wanted to retain ownership of the rights to publish the content.