The government has made it mandatory to link Aadhaar cards with bank accounts, permanent account numbers (PAN), income tax return (ITR), social security schemes and even mobile phones. If one does not have the 12-digit Unique Identification Number issued by the Unique Identification Authority of India, he will have to now get it made in order to avail all these facilities. In fact, the government recently extended the deadline for obtaining Aadhaar for availing government schemes and subsidies by three months to December 31.
Source: http://contacts.connequitymailer.com/viewinbrowsers/index/kfvwRSFabsAyqKffSnwndnkqB/Adhaa.html