Square Gateway Payment In Test Mode

Is there way I can easily an entry was in Test Mode  VS live Mode.

I inadvertently had my live form published while still in Test Mode, is there a safeguard I can put in place so if anyone tries to submit while in Test it will actually say, this transaction is in Test mode and no charges will be made to your card. 

There isn't a message in the form (since test mode is used for form owner to test the transactions) but you should receive an email for such test transaction, something similar to this:

Hope it helps.

Let us know if you have any further questions.

Thank you!