how to create error message when Invoice Received Date equals Invoice Date?

Summary:

how to create error message when Invoice Received Date equals Invoice Date?

Content (please ensure you mask any confidential information):

how to create error message when Invoice Received Date equals Invoice Date for invoice from supplier portal?

error message can be shown when user save or validate the invoice

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

23C

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