Once the process of your payment is completed, you are able to download and print the payment invoice from your Transaction History.
Next to each integrated transaction there will be the invoice.
1) Click on your name on the upper right hand-side of the screen.
2) Go to 'Reservations' page and select the tab 'Transaction History'
We would be happy to help you and answer to your questions, so please, contact us at firstname.lastname@example.org.