What happens when you inactivate a card
If you mark the Inactive Card option, the card will no longer appear in Select From List windows. Previously entered transactions, such as sales or purchases, won't be affected in any way.
You can enter a transaction for an inactive customer; you'll have to enter to card name, rather than select it from a list, however. The transaction will be recorded just as if the card were active.
You can make a card active again at any time simply by unmarking the Inactive Card option.