Artificial Watermark is a printed simulated watermark applied by the paper manufacturer or by the form manufacturer, as opposed to a true Fourdrinier watermark produced during paper manufacturing.
An Artificial Watermark visually simulates a true watermark but is only visible on the side where the artificial mark is applied. This feature is effective primarily in document-present situations where the original document can be examined by a trained professional or scanned with a specialized 3-illumination ID scanner and analyzed with adequate forgery detection technology.
Usability in online and mobile onboarding situations is challenging as the examination is made not on the physical document but on a photograph or scanned image of it.
Ref.: http://www.isdausa.com/uploads/Security_Glossary.pdf