Learn how to Detect fake Aadhar card using online portals, mAadhaar app, and verification APIs. Methods To Check Fake Aadhar Card through an Online Portal. Visit UIDAI’s official website (uidai.gov.in), then find the Verify Aadhaar Number Service, after that Enter the Aadhaar Card Number with the security code. And Get the details of Aadhaar Card.