To set up prepaid cards at the center level:
Ensure that you are at the center level.
Navigate to Admin > Organizations > Centers > click the center Name > Click the Settings tab > Expand the Invoice & Receipts section.
Scroll down to the Allow prepaid card sale in POS setting.
This field is already enabled by default, thus allowing the sale of prepaid cards.
Clear the field, to restrain the sale of prepaid cards in the POS window.
The Prepaid Card tab does not appear in the POS window if the Allow prepaid card sale in POS checkbox is not selected.
The following image is an example of the Prepaid Card tab showing in the POS window: