You can deactivate an American Express virtual Card even if a balance remains.
NOTE: Card deactivated not deleted.
The Card will get deactivated but will remain in your Virtual Cards list.
Here’s how to deactivate an American Express virtual Card:
1. Sign in to your Melio account.
2. Click Expenses in the left sidebar.
3. In Virtual Cards, select the relevant Card and click it.
4. In Virtual Card details, click More actions.
5. Select Deactivate Virtual Card from the list.
6. In the Deactivate Virtual Card warning message, confirm by clicking Deactivate Virtual Card.
The Card is labeled CANCELLED. You can still see all of its details by clicking it.