Atleast 3 banks have their ATMs in the T3 Arrival section of Delhi’s Indira Gandhi International Airport: Citibank, Kotak Mahindra and IndusInd Bank. There are 2 ATM kiosks before the customs and atleast 2 after.
Your foreign cards shall work at all the ATMs in the airport, atleast, unless your bank has imposed any restrictions on withdrawing cash in foreign countries. Make sure that you call and inform your bank of your trip and I would recommend you to have some upper cash limit set on your ATM withdrawl.
Having access to local currency (Indian Rupee) is the first and foremost important item a foreign traveler would need starting from the airport.
In the arrival section (Terminal 3) of the Delhi airport, there are currency exchange counters before the customs and after the customs area.
Before the customs, there are 2 currency exchange counters: 1) Thomas Cook and 2) Central Bank of India. Both the counters are open 24 hours.
Difference: Central Bank of India don’t charge any commission whereas Thomas Cook does and both gives the same exchange rate.