I have a quick action button named "Submit Project Code Request" that will send an email alert to our finance department.  I have a checkbox named "Prj Request Sent to Finance" that is auto-populated True when I click the button to "Submit Project Code Request". I also have a Success Message that will show up when I click save.  I would only like the Success Message to show up when the "Prj Request Sent to Finance" checkbox is True.  If I decide to uncheck the box for "Prj Request Sent to Finance" and click save I get the same Success Message.  How do I set this up where the Success Message only shows up when the checkbox equals True and not when it equals False? 

Thanks