So Do You Think They Have Special Training Classes for This? The AP reports in "Copyright-Worried Photo Labs Spurn Jobs." From the article:

Copyright law requires photo labs to be on the lookout for portraits and other professional work that should not be duplicated without a photographer's permission. In the old days, questions about an image's provenance could be settled with a negative. If you had it, you probably had the right to reproduce it.

Now, when images are submitted on CDs or memory cards or over the Web, photofinishers often have to guess whether a picture was truly taken by the customer — or whether it was scanned into a computer or pilfered off the Internet.