Formal:
* பான் கார்டு (Paan Kaardu): This is a direct transliteration of "Pan Card" and would be understood by most people.
* தனிநபர் கணக்கு எண் அட்டை (Thaninabar Kankku Enn Attai): This translates to "Individual Account Number Card" and is a more descriptive way to refer to it.
Informal:
* பான் அட்டை (Paan Attai): This simply means "Pan Card" and is a more casual way to refer to it.
Ultimately, the best translation will depend on the specific situation and the audience you're speaking to.