how to block aadhaar card

To block your Aadhaar number, you can use the Aadhaar Lock/Unlock service provided by the Unique Identification Authority of India (UIDAI) to prevent its misuse. This feature locks your Aadhaar (UID) from being used for all authentication purposes, including Biometrics, Demographic, and OTP modalities. To lock your Aadhaar:

• You must have a pre-generated 16-digit Virtual ID (VID).
• You can visit the UIDAI website (under the 'My Aadhaar' tab, 'Aadhaar Lock & Unlock services') or use the mAadhaar app.
• Alternatively, you can lock your Aadhaar by sending two specific SMS messages to 1947 from your registered mobile number.

Once locked, you must use your latest VID to unlock it for any authentication.