How do I know that my online car hire reservation has been confirmed?

At the end of the online booking process a "Summary" or booking confirmation appears, giving the reservation number. Immediately after the booking has been made, you will receive a voucher and copy of the invoice by email (PDF).
Print out a copy of the invoice and voucher for your records.

Further information:

Required documents by collection: What documents do I need when collecting my car hire?

Cancellation protection: Is there any cancellation protection?