If you want to learn more about how billing credit works, read this article.
All transaction of billing credit is published to all sign-in admin via this page. In Credit History, a description of the reason for the action will be provided in the description column for the user's preference. The amount of credit credited to the user will also be displayed as well as the date and time the action was carried out.
To check on the current state or the changes in a user's credit, navigate:-
Step 1 - Go to "Credit History"
Step 2 - View the dashboard
If you have any questions about your billing credit, contact your Success Manager.