- Steps for blocking a prepaid card :
- Go to Sales Management >Transaction> prepaid card transaction (S> T> P)
- Alt+B (or use “-Block Card” button)
- Give the selected card number and press enter.
- Use “Yes” to block the card

- Steps for unblocking prepaid card :
- Go to Sales Management >Transaction> prepaid card transaction (S> T> P)
- Alt+U (or use "-Unblock Card" button)
- Give the selected card number and press enter.
- Click on Yes to block the card

For more detail please visit: http://www.rancelab.com/help/fr6_prepaid_card_transaction.htm