Please see the following on how to move a user to another credit card.
Our Expense Administrator will need to go into the:
Click Settings, then select Users
Search for the User, then select Edit
Click Add Credit Card (right-hand side); ensure that you're selecting the correct Credit Card Scheme for the User and adding the Credit Card details into the correct fields. Make sure to save the user once done.
For the user that has left I would recommend following the same steps:
Search for the User
Select Edit and scrolling down to the bottom, it'll show all of the Credit Cards assigned to the User; under the Actions button next to the credit card, select Delete and then Save.