The incident occurred late last night when CISF security personnel at the Indira Gandhi International Airport (IGIA) detected a youth roaming around suspiciously inside the terminal area.
According to police, upon questioning, the 28-year-old youth, identified as one Qiao Anquan from China, disclosed that he had prepared a fake e-ticket to enter the airport as he wanted to see off his girlfriend, who was flying to Shanghai.
The security personnel then called up the airline concerned to check the passenger list for the flight and found that Anquan was not booked for travel on the same.
Only those with valid travel tickets are allowed to enter the terminal area of the airport.
A case of criminal trespass (Section 447 of IPC) and using as genuine a forged document (Section 471) has been registered against the youth who was later placed under arrest, the official added.