So you have found your image being used without your permission. First thing you have to understand is that you own the copyright to that image the second you click the shutter. You do not have to register it in order to claim copyright status. (although registering your images with the copyright office does give you better standing in a legal fight and increases your potential damage awards). Second is that as the copyright holder only you have the right to determine how the image is to be used and where it is to be displayed. Third is that it does not matter if the image is not being used for commercial purposes (i.e making money off it) it still is a copyright violation if you did Hello,
I have found that the following image IMAGE URL located at LOCATION URL is using my copyrighted image which can be found at YOUR IMAGE URL without my permission. Please have the image removed immediately.
I look forward to your positive response.
Or something of that