Printer tracking dots

Printer tracking dots are rather secretive, but reputed to be inserted in printed documents on many current-day color printers, with rumors of the existence of secret agreements between governments and printer manufacturers to ensure this "feature" is present on all major printer models. They are hard-to-see patterns of light-colored (usually yellow) dots that can, to knowledgeable observers, allow it to be determined when and by whom something was printed. It has been reported that this played a role in uncovering the government leaks of Reality Winner (yes, that's her real name) in 2017.

Links

 * List of Printers Which Do or Do Not Display Tracking Dots (EFF)
 * How The Intercept Outed Reality Winner
 * Seeing Yellow