The terminal serial number is printed on labels affixed to the shipping box and to the back cover of the payment terminal. The terminal serial number is usually preceded by "SN" or "S/N."
If the terminal serial number is illegible or missing, you can print the serial number from the payment terminal.
  1. On the payment terminal’s IDLE screen, tap
    Settings
    .
  2. When prompted, enter the settings password and tap
    OK
    .
  3. Under System, tap
    Status
    .
  4. Scroll to the bottom of the Status screen to find the terminal serial number.