this post was submitted on 02 Mar 2026
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Isn't that really easily defeated by secondary selling?
If I buy a second hand printer there's no way to trade it back to me.
And what of laser printers?
They don't register the printer. If you're suspected of something and there is something printed as part of the evidence, they can then get a warrant and check if your printer matches. If you printed it and then destroyed the printer, then the tracking probably doesn't matter.
It's to link pieces of the same printed paper to the same printer and if they incriminated you they can cross reference.
For example printers detect and block printing money, but you manage to do it somehow they can trace the money back to the same source. Even if you are the first owner they can't trace it back to serial numbers because these aren't registered with a purchase.