Does the customer receive emails when the payment fails?

• Yes, your customers will receive emails on failed payments if you enable notifications for them from the 'Notifications' section. Below is the screenshot. 

• Please check this article on notifications for more details: https://payfunnels.helpscoutdocs.com/article/123-customize-notification-for-clients

Email us at support@payfunnels.com if you have any questions.