We have enhanced the user interface to make it easier to toggle between multiple credit cards on file for a patient, ensuring it is clear which card will be charged. The invoice creation process has also been simplified to ensure the correct card is selected, reducing the risk of multiple invoices or incorrect billing. Additionally, we have improved the dropdown menu for selecting billable parties by displaying associated card numbers. This helps users accurately select the intended card, even in situations with multiple 'self' billable parties. 

Thank you for choosing Ambiki.