If your printer is on a network, it can 'phone home' in most cases. They now know which IP address the printer lives behind. Get compromising document > look up serial number from dots > look up IP address from serial number > get address for IP from ISP (through means fair or foul). Payment option is irrelevant.
In those "most cases" when it's not blocked from doing so by your firewall.
If you were paranoid enough to pay cash for a printer somewhere far from home because of the tracking issue, you will probably block it from sending messages outside of your LAN.
