European standards and other CEN-CENELEC publications are usually sold in electronic form as PDF or similar files, or in products containing European Standards or other CEN-CENELEC publications. Such documents sold in electronic form carry a watermark, which helps identify the correct licence. The watermark includes the name of the customer and the download date on each page of the standard.
These publications are, as a rule, duly watermarked by the national standards organisations who sell them.
CEN and CENELEC Members may also apply, at their own discretion, additional Digital Right Management (DRM) controls to protect against unauthorized copying or sharing of European Standards.