I sold a bunch of images to a client of mine on a CD. I printed a label for the CD and stated on the label that the images were ok to reproduce. I simply put in text that "client" has permission to make reprints. She went to a particlular place to make thank you cards and they wouldn't help her because they said the pictures were from a professional photographer. She pointed out the fact that the release was on the CD itself. They said that doesn't matter and they needed something in writting. Does anyone know the real laws on this. I released the copyrights by printing it on the CD with my name and number. What are the rules???