What is a watermark? When you order a watermarked ebook we create a personalised copy of the file with your name applied visibly but discreetly on the document, along with an invisible identifier. These are known as watermarks and associate the file to you, the purchasing customer. Don't worry – we've made sure these identifiers contain absolutely no other personal information about you. This allows us to identify and minimise unauthorised copies in circulation without forcing unwieldy DRM (digital right management) onto our customers. No passwords. No hoops to jump through. Just the content.