Today many people will add a copyright logo to the photos they sell online or use in their blog or website. The Watermark is used to protect your images. However, this isn't always the way it works. People have found ways to delete these logos or Watermarks and still use your photo. Basically, all you can do is this: You'll need to check periodically online to make sure your photos aren't appearing on other sites online. You can use Google and Google Alerts to search for stolen photos online. The simplest way is to set up some Google Alerts and when anyone mentions you online, you are alerted by Google. You can also Google yourself. This is a great way to find the images that people have used and given you credit for the image, but don't have your permission to use them. Do a reverse image check for your images. Search by the image URL or upload your images to Google and search by each image. Invisible Watermarks are the best way to keep your images safe. Digimarc can use the invisible Watermarks to find your photos. It is a good idea to always protect your property online and use a service that can help you find the person who has borrowed this without your permission.