Unpaid hold tickets are referred to as block tickets » . Some terms for a block ticket are itinerary, dummy ticket, or aircraft reservation. The complete name of the passenger, the origin and ****, the traveler's full name, and all other flight information are contained in the block ticket. The main distinction between a confirmed flight ticket and a bogus ticket is that the former has already been paid for, while the latter has not and is still pending. Using the airline's website, you can confirm the validity of the PNR (booking reference number) that is included with a block ticket.
If a ticket's PNR is invalid and cannot be verified on the airline website, it is considered a phony block ticket. And viola! You would be able to purchase a verifiable block ticket » for INR350/$5, in only 10 minutes.