Possible misuse of content

[Chop Smith]

Background
I have got about 100K of semi-exclusive content that I use on my sites. Semi-exclusive in that it was to be used by three program owners. So I am reviewing an affiliate request, I get to the site and find that almost all the site's content is stuff that I also own. The site does not contain full sets and it appears that the site owner has cropped the images in such a way to remove watermarks.
Statement:
I am not ranting or accusing anyone. I am not even mad at this point.
Question:
How should I tactfully handle this? Would it be appropriate to email the guy and ask him to furnish me proof that he has a license to these images?
Conclusion:
I hope all this speculation proves to be wrong. If it proves correct, I will take action. I have a brother that is a minister and I will ask him to pray for the guy. I will see if I can get Bubba to locate Gabbo and pay the guy a visit. And most certainly, I will let my attorney earn a little money.