Open the Aadhaar PDF file in Adobe Acrobat Reader
Right-click the signature panel or click the signature field
Select Signature Properties
Click Show Signer’s Certificate
Check the certificate details and validity status
Verify that the certificate is issued by UIDAI or a trusted certificate authority
Confirm that the document shows the signature as valid
Check the date and time of signing
Ensure the Aadhaar PDF has not been modified after signing
If the signature shows as invalid, update Adobe Reader and verify again
If needed, use the UIDAI e-Aadhaar verification option on the official UIDAI website