Safety Background is a type of security paper manufactured with a printed pattern to show evidence of any attempt made to alter the document by erasing or by chemical alteration.
This Safety Background feature is effective primarily in document-present situations where the original document can be examined by a trained professional or scanned with a specialized 3illumination 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.: https://www.perfectcloud.io/resources/glossary/