I got an e-mail from a client which I did a logo for the web. I created a gif file format two versions, one with sample over it. I also forwarded a document releasing copyright on the specifics of those images and format. Now I receive an e-mail such as "Could you please send me the PSD file as an attachment as well, so I can save/use it in various formats?" Isn't that like asking a baker for the receipe to his cake? I don't believe anyone is legally entitled to it unless I release the copyright on it...correct? Why would I do that anyhow? Isn't that giving up trade secrets and raw data? How could I best express this and is there any law I can point to.