When logged into your HONK Account, select the menu in the top left corner (three lines) and select 'Parking Sessions'. All parking sessions will be listed here, with the most recent being on the top.
If you have an active session and you click on this from the sessions tab, you will be brought back to the original success page with a count down timer that updates in real-time.
A receipt of your transaction is also sent to your associated email address when you complete a transaction.
If you used Express Checkout you would have to go back to your web browser where the QR code opened to view the success screen - or lack thereof. If you have paid already at the location it will alert you before you pay again.
If you are still unsure, please contact support@honkmobile.com for further assistance.