How to show an warning message when invoice currency is not same as payment currency?

Summary:

Business want to get an alert or pop up when Payment currency is not same as Invoice currency? Do you think we can do a form personalization on the Invoice screen to achieve this?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):