MARGAO, May 9 -- Senior citizens in Margao are being forced to navigate an expensive and convoluted process to correct errors in their Aadhar cards-mistakes many claim were made by data entry staff during registration.

Citizens now face a bill of nearly Rs 2,800 for even minor corrections, such as spelling mistakes. The process involves submitting a legal affidavit and publishing a notice in the official gazette.

On Friday, a group of disgruntled citizens queuing outside an Aadhar correction centre voiced their anger. "We submitted all valid documents showing the correct name," said Jeron Colaco of Arlem-Raia, who was assisting an 83-year-old. "But due to an error by the staff, we're now being told to produce an affidavit costing Rs 700...