How do I verify a signature on a DigiLocker PDF?

You can verify the signature by uploading the original PDF downloaded from DigiLocker to PDF SignCheck. Our tool extracts the PKCS#7 signature block, cryptographically validates it, and generates a stamped PDF showing a valid signature badge.

Why is my DigiLocker signature showing a question mark?

The question mark means Adobe Reader does not contain the root Certifying Authority of India (CCA) certificate in its local trusted store. Cryptographically, the signature is intact, but you must trust the certificate manually in Adobe Reader or verify it using PDF SignCheck.

Government Documents

DigiLocker PDF Digital Signature Verification

Verify validity of signatures on Indian government marksheets, vehicle registration certs, land records, and Aadhaar cards.

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Verify DigiLocker Signatures Online

Verify your CBSE marksheet, driving license, or Aadhaar card signature instantly. Upload your PDF to our online verifier to trust the signature chain and download a stamped document containing a valid checkmark.

1. Why does DigiLocker show “Signature Not Verified”?

When you download official certificates, vehicle registrations, or academic marksheets from the **DigiLocker** portal, they include a digital signature block. Inside standard PDF viewers, this block often displays a **yellow question mark** or says **“Signature Not Verified”**.

This occurs because DigiLocker and other Indian government services (such as CBSE, e-District portals, and Income Tax departments) use digital signature certificates issued under the **Controller of Certifying Authorities (CCA) of India**.

By default, standard PDF viewers like Adobe Acrobat Reader or browser PDF viewers do not include the CCA India Root Certificate in their trusted root store. Because the viewer cannot verify the authority that issued the signature, it reports it as unverified.

2. Step-by-Step: Verifying DigiLocker PDF Online

To quickly resolve the signature trust issue and create a printable, official version of your certificate with a green verified checkmark stamp, follow these instructions:

Download your digitally signed PDF certificate directly from the DigiLocker app or website. Do not use the browser's “Print to PDF” function, as this removes the digital signature.
Go to the [PDF SignCheck homepage](/) and drag your downloaded document into the upload zone.
Our cryptographic parser will extract the Indian CCA digital signature block and verify the hash against the certificate chain.
Download the stamped PDF. It will contain a permanent, visual **“Signature valid ✓”** badge, rendering a green checkmark on all devices and browsers.

3. Trusted Certifying Authorities in India

The digital signatures verified under the CCA India guidelines are cryptographically secure and legally recognized under the Information Technology (IT) Act, 2000. Common certifying authorities that PDF SignCheck validates include:

eMudhra: Commonly used for tax returns and corporate filings.
National Informatics Centre (NIC): Used for official government emails, certificates, and land registries.
SafeScrypt (Sify): Widely deployed in commercial contracts and digital signatures.
CDAC (Centre for Development of Advanced Computing): Used in academic documents and e-Sign.
Capricorn CA: Employed in e-procurement and government tenders.