Hmmm. Actually, I just noticed they stripped off the watermark. In the US, under the DMCA that's serious business and could land them in trouble... between $7,500 and $75,000 worth of trouble. This figure is fromstatutory damages, which are an option for the victim of the theft to request instead of having to demonstrate "actual" damages. You can request statutory damages (damages written into the law so they cannot be reduced or contested) instead of asking the court to calculate how much the actual damages were. These statutory damages are aof $2,500 and a maximum of $25,000 per infringement, plus whatever attorney fees you had to pay. Removal of the watermark shows that the infringement is intentional, and that the people doing it absolutely knew they were infringing, so damages are automatically tripled.Reference: www.photoattorney.com/2007/07/… I seem to remember that you are in Germany, which is a signatory to the Berne Convention, so your copyright is valid in the US where the infringement took place.If the infringers try to take down the photo and say they never did it, refer the court to web.archive.org/web/2016062103… ... Archive.org is a full independent history-of-every-webpage storage site, and has been used successfully many times as proof of a web page's contents in court. archive.org/legal/faq.php will tell your lawyer how to get an affidavit (sworn statement) that the contents of the Archive for that page are accurate and haven't been tampered with. www.photoattorney.com/help-ive… for what to do. In fact, you might want to contact this attorney, or one like her who is local to you. She/they can take the steps necessary to establish proof of the infringement that will hold up in court, and will know how to force these people to appear in court to explain themselves. The removal of the watermark/signature is what pretty much seals their doom.Go get 'em. I hate slimebags that steal from people like you.