The Union government's decision to make Aadhaar mandatory for filing Income Tax returns and for retaining the permanent account number (PAN) has left many with an identity crisis of sorts. Many are finding it difficult to link their PAN to Aadhaar as their names do not match with the Aadhaar database. That is because the Aadhaar database, unlike PAN, does not recognise special characters. For instance, someone with a D'Silva surname will not recognised by the Aadhaar database despite the PAN card carrying that name. Similarly, someone with a name like B.S. Krishna on his PAN card will not identified by the Aadhaar database as the dots are not recognised by the system.