Single-use cards
If your single-use virtual card does not have sufficient amount of funds for the payment to go through, you need to:
Go to "Requests" tab,
Delete the previous request,
Click to create a New Request, this time requesting a higher amount making sure there will be enough funds to cover the payment.
If the payment is in another currency, add 6% to the budget to make sure there is no issue (normal currency fees should be 2.99%).
Recurring cards
If your recurring virtual card runs out of funds for an upcoming purchase:
Go to "Subscriptions" tab,
Click on the subscription in question,
On the right side panel scroll till you see "Action" button,
Click on "Edit monthly budget",
Make sure that monthly budget is above the amount of the purchase to come.
If the payment is in another currency, add 6% to the budget to make sure there is no issue (default currency fees should be 2.99%).
Physical cards
If your physical card runs out of funds, request a top-up.