Versions Compared


  • This line was added.
  • This line was removed.
  • Formatting was changed.

Table of Contents


The Cardknox app enables you to accept customer payments on your Android or iOS smartphone device. You can also process refunds and voids.


The Charge/Refund screen is the first screen displayed after you log in:


Charges and Refunds


Type in the amount in the center of the screen.


Note: If you prefer, you can start the refund on the Transaction Details screen, which auto-fills many fields for you.

  1. If you are on the Transaction Details screen, tap the small Cardknox icon at the top center:

    Image Added
  2. Type in the amount in the center of the screen.

    Image Added

  3. Tap the Charge or Refund button.

  4. Fill in the remaining fields that are displayed.
    Tip: Required fields are noted on the screen:

    Image Added

    - If you need to change the amount, tap Back in the upper left corner to return to the previous screen.
    - Tap Clear all to remove information from all of the fields.

  5. Tap the Process Transaction button.


To filter the transactions list:1.

  1. Tap the filter icon in the upper right corner:


Tap to apply filter criteria to the transactions list2.

  1. Choose which type(s) of filter to apply:


  • Amount - Tap and type in the amount.

  • Card number – Tap and type in the last four digits of the card.

  • Cardholder name – Tap and type in a name.

  • Transaction type – Tap once to open a list of transaction types. Tap to select one or more of the following types:

    • Sale

    • Auth

    • Capture

    • Credit

    • Refund


  1. Tap Done (upper left corner) to view the filtered list.

Remove Filters

Above the transactions list, the mobile app displays any filters that have been applied: