Hello,
Lets say, theoretically, that I am a designer. Lets then say that I
design a logo for a company and they pay me for the logo. I then
transfer (by signing a document- my signature is the only one on it
-it is not a contract just a transfer of copyrights)all copyrights to
the company or person who purchased the logo. Now let's say that down
the line that company is sued because the logo that I designed is
found to be infringing on another trademarked logo. Do I have any
liability in this theoretical scenario? We are, of course assuming
that I have not purposely stolen or copied any designs. Lets also
assume that in doing this project I never entered into a signed
contract with the business for whom I designed the logo. One more
question: what if you applied this scenario to other types of graphic
design work such as, for example, a marketing postcard, an
illustration for a cd cover or a poster?

Please let me know if you need further clarification.