Payment submission not showing in submissions list

I have had a parent sign up a player and I received a email from paypal that they have paid but it is not showing up on my submissions list?

Hi,

Please kindly check your form's Incomplete Payment: http://www.jotform.com/help/564-how-to-view-incomplete-payments-of-your-payment-forms/. Check if the payment submission has landed there. 

In addition, we advise to enable IPN (Instant Payment Notification) to your Paypal Account. Here's a guide on how you can do that: http://www.jotform.com/help/276-How-to-Enable-IPN-for-Paypal.

For you to understand why this is needed, please check this guide: http://www.jotform.com/help/272-Paypal-Incomplete-Payments-FAQ.

Hope that helps!

Thanks