If you are going on a business trip, you can use your card account statement as a confirmation of the flight purchase. We recommend that you have the airline staff seal your itinerary receipt at check-in.
Your itinerary receipt is also considered as a proof of purchase; you can download it by following the link in your confirmation email and print it should the need arise. ОneTwoTrip normally does not provide other forms of invoices.
Please note that OneTwoTrip is not registered for GST in Singapore and OneTwoTrip does not charge customers GST in relation to its services. OneTwoTrip therefore cannot provide customers with a GST tax invoice.