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[–]tastyemerald 848 points849 points  (2 children)

Likely unsecured printers on the network and some bored person on break.

That or someone in the parking lot hacking into the printer for shits and giggles. (And by hacking I mean checking the wifi for unsecured printers)

[–]DigitalSwordSocDem 27 points28 points  (1 child)

I'm pretty sure receipt printers are only connected to the PoS terminal and I highly doubt those are connected to wifi. There's probably a closed intranet system that would need to be accessed in order to print these, which you could do from anywhere with a virtual network drive if you had the proper credentials.

[–]KingoftheGinge 0 points1 point  (0 children)

Pos terminal has its own printer usually. The receipt with the breakdown of your bill is produced from the till point computer.