In India, a person is allowed to have only one PAN (Permanent Account Number) card. If a person is found to have more than one PAN card, they are in violation of Indian tax laws and may face penalties.

To check if a person has multiple PAN cards, you can use the PAN verification service provided by the Income Tax Department of India.

This service allows you to enter a PAN number and verify its authenticity and status, including whether it has been issued multiple times. Additionally, you can also check with the PAN card issuing authority, NSDL or UTIITSL, to check if multiple PAN cards are assigned to the same individual or not.