Practical, India-first guides to verifying the digital signatures on your official documents — GST, income tax, company filings, DigiLocker and Aadhaar — and to fixing the dreaded "Signature Not Verified" warning.
GST
Your GST Registration Certificate carries a GSTN digital signature. Here is how to confirm it is valid, why Adobe shows "validity unknown", and how to prove it to a bank or vendor.
Income Tax
The Income Tax Department signs your ITR-V acknowledgement. Learn how to verify that signature, read the password rules, and generate a clean green-tick copy.
MCA / DSC
Directors and CS professionals sign MCA filings with a Class 3 DSC. Here is how to confirm those signatures, spot an expired certificate, and validate the CA chain.
DigiLocker
Every DigiLocker "issued document" is signed by the issuing authority. See how to verify that signature outside the app and what the green tick really proves.
Aadhaar
Your e-Aadhaar is password-protected and signed by UIDAI. Here is the exact password format and how to verify the signature without installing anything.
Explained
Behind every valid Indian digital signature is the CCA and a chain of licensed Certifying Authorities. This guide explains the trust model in plain language.
PAN
Your e-PAN is a signed PDF issued by NSDL/Protean or UTIITSL. Here is how to verify that signature, the password format, and what the green tick proves.
Banking
Loan officers and embassies increasingly reject edited bank statements. Here is how to prove your signed e-statement is the untouched original.
Employment
Fake offer letters are common. A DSC-signed offer letter can be proven genuine in seconds — here is how, and how to spot a forged one.
Invoicing
A digitally signed invoice proves the amount and vendor details were not altered. Here is how to verify one — and how to raise your own signed invoices.
Education
Digitally signed degrees and marksheets can be verified instantly. Here is how employers and universities confirm they are genuine and unedited.
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