You will be subject to additional screening, to include a patdown and screening of carry-on property. You will not be allowed to enter the security checkpoint if your identity cannot be confirmed, you choose to not provide proper identification or you decline to cooperate with the identity verification process.

If you attempt to fly internationally without a passport, you will almost certainly be denied boarding at the airport, as airlines are legally required to verify that passengers have valid travel documents for their destination. For domestic flights, however, a passport is usually not required; you can typically fly using other government-issued photo IDs such as a driver's license, national ID card, or an Aadhaar card in India. If you lose your passport while abroad, you must contact your country's nearest embassy or consulate to obtain an "Emergency Travel Document" or a "Temporary Passport" to get home. Flying without any form of valid identification is virtually impossible in modern aviation security, and you would likely be turned away at the initial security checkpoint before even reaching the gate.