The issue was raised Monday in the Rajya Sabha, the upper house of India's Parliament, and some lawmakers were concerned aviation officials aren't taking the matter seriously enough, the Press Trust of India reported.
The issue is serious and officials are dealing with it appropriately, but the problem isn't as widespread as some fear, said a senior member of the Directorate-General of Civil Aviation.
"I don't think it is as rampant as is being shown," said the official, who requested anonymity. "Even till last week, there was no idea about such a matter."
The aviation agency said it would examine the documents of up to 4,000 pilots to ensure they are legitimate, the Indo-Asian News Service reported.
In the past few days, two pilots were arrested for allegedly obtaining their flying licenses through the use of bogus documents.
"When such matters were reported to us, we conducted our probe and took action and we will keep the probe on to scrutinize other documents to make sure all proper procedures were followed," the aviation agency official said.
"We investigated on the reported pilots and found some discrepancies, which were immediately reported to police. This means that we have systems to take care of such things."