Fake flight ticket

Photoshop or any other image editor could be used, with a little extra work, to produce the fake airline tickets. They don't have a PNR code and can't be verified on the airline website. It is risky to use a fake plane ticket as proof of return or even to apply for a visa because fake tickets are easy to spot.
In order to pass immigration control or file for a visa, you have to buy a forged ticket with a verified PNR.
You may get a dummy ticket for just INR350/$5, in 10 minutes.