There are two data masking options for the Epson thermal receipt printers. In each instance, the data is hidden with a series of "X" characters:
  1. Member Name: the complete member name at the bottom of the receipt is masked.
  2. Account Number: This includes both the account number in the transaction detail and the account number at the bottom of the receipt. From one to eight characters may be hidden. It is recommended that the last two or three digits of the account number are not masked so that the member has a partial numeric identifier when they refer back to their receipt. The full account suffic will remain visible.

Please note that masking is not available for Ethernet-connected thermal receipt printers at the present time.