https://www.eff.org/pages/list-printers-which-do-or-do-not-display-tracking-dots
(Added 2017) *REMINDER: IT APPEARS LIKELY THAT ALL RECENT COMMERCIAL COLOR > LASER PRINTERS PRINT SOME KIND OF FORENSIC TRACKING CODES, NOT NECESSARILY > USING YELLOW DOTS. THIS IS TRUE WHETHER OR NOT THOSE CODES ARE VISIBLE TO > THE EYE AND WHETHER OR NOT THE PRINTER MODELS ARE LISTED HERE. THIS ALSO > INCLUDES THE PRINTERS THAT ARE LISTED HERE AS NOT PRODUCING YELLOW DOTS.* I have a theory as to why. CALEA allows the government to compel "a manufacturer of telecommunications transmission or switching equipment" to modify the equipment. Under that or a similar law, printing manufacturers are compelled to put tracking information onto paper.
