I recently took some images of a sporting event. The association running the event asked for some of my images for use on their website and I graciously gave them the images for free on the condition that they credit the images with my name. I've since noticed that they've plastered my images on their website, facebook site and printed materials for their competitions - all of which without any credit to me.
I've volunteered for this organisation for the past 10 years and know they have continual staff turnover which is probably why this occurred...but that said, they're a business and they're using these images to make lots of $$ whilst not meeting the T&C's the images came with.
What would you do?