One thing to consider is that if you were to succeed in placing hidden text/image on an ID card, it may fail manual forgery checks at airports and police statio

One thing to consider is that if you were to succeed in placing hidden text/image on an ID card, it may fail manual forgery checks at airports and police stations. One of the many ways IDs are checked is with different types of lighting[1]. This might have made this stand out as an artifact, which could result in an officer doubting its legitimacy. [1] https://www.airport-suppliers.com/supplier-press-release/the-security-of-ids-volume-4-optical-security-features-ir-uv-ovds-and-more/ https://www.airport-suppliers.com/supplier-press-release/the...