[–] 5541608? 0 points 9 points 9 points (+9|-0) ago
Not a serial number, but an encoded series of colored dots. It usually DOES contain a serial number but can also contain the time, date and size of the print job, which computer it came from (MAC address) and even the title. Thankfully its not every brand, or even all models sold by the brands. But it does appear to be the most common printers used by offices.
[–] 5541135? 0 points 4 points 4 points (+4|-0) ago
Good question. I have heard this before, but I don't know if it is true.
However, I do know that most of the time a printed page can be matched up to the printer it came from because every printer makes minor copying errors that can be matched like a fingerprint.
But you would have to know what printer to look at to make the match.
[–] 5541123? 0 points 17 points 17 points (+17|-0) ago
Maybe.
https://www.eff.org/issues/printers
https://www.eff.org/pages/list-printers-which-do-or-do-not-display-tracking-dots
[–] [deleted] 0 points 2 points 2 points (+2|-0) ago
[–] 5542825? 0 points 1 point 1 point (+1|-0) ago
There are some Brothers printers that don't