Check field but not until field is entered

I have a field that I am having the user enter in a "code" to allow them not to pay for a service.  If they enter the wrong code it shows an error message.

The problem I am having is that it shows the error message as the field is being entered into.  What I mean is that if the code I am looking for is Payment.  If I type P it says Invalid Code and keeps saying that until I have typed the entire word.

How can I get it so that it doesn't check until I am done typing?

On my form the field to enter this code is Coupon Code.

Unfortunately, that is not possible. The conditional logic will be triggered even if the user enters the first letter of the coupon code.

How about using the spreadsheet to form a widget to trigger the hide/show for your error message?

Please check this demo form: https://form.jotform.com/201462136833955

You can enter john@example.com to reveal the form fields.

Related Guide: How-to-Use-the-Spreadsheet-to-Form-Widget