A dummy ticket is a legal document that serves as proof of return, immigration, filing for a visa, and other uses. You can view its live PNR on the airline website by choosing Manage My Booking or Manage My Trip. It contains all the information needed, such as the ticket itself, the itinerary, the date of the journey, the passenger's name, the contact details, and the PNR.
For about INR200/$3, you may get a validated dummy ticket in less than 10 minutes.
To buy a fake ticket right now, go to https://www.airdummyticket.com.