How to Fix Yellow Question Mark on Aadhaar PDF — Complete 2026 Guide

When you download your electronic Aadhaar (e-Aadhaar) from the official myAadhaar UIDAI portal (myaadhaar.uidai.gov.in) and open the document inside Adobe Acrobat Reader, Google Chrome, or Apple Preview, you are frequently greeted by an annoying warning:

"Validity Unknown ? The author has digitally signed this document with an uncertified or untrusted certificate."

For millions of citizens across India submitting documents for bank account opening, passport appointments, property registration, loan processing, or college admissions, this yellow question mark creates needless friction. Bank officers and administrative staff frequently reject the printout, requesting a version displaying the official green checkmark.

In this detailed guide, we explain the exact technical reason why this error happens, what Long-Term Validation (LTV) is, how to use Kagazo to fix it in seconds without installing any desktop software, and what the verified signature means under the Information Technology Act, 2000.

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Why Does the Yellow Question Mark Appear?

The yellow question mark is not an indication that your Aadhaar card is fake, compromised, or invalid. Rather, it is a consequence of how international desktop software handles national cryptographic hierarchies.

1. The Separation of Root Keystores

When UIDAI generates an e-Aadhaar PDF, it applies a digital signature using an X.509 certificate issued under the Root Certifying Authority of India (RCAI), governed by the Controller of Certifying Authorities (CCA India) under the Ministry of Electronics and Information Technology (MeitY).

However, software vendors like Adobe, Apple, and Microsoft maintain their own private certificate trust programs (such as the Adobe Approved Trust List, or AATL). Sovereign Indian government root certificates are not pre-installed in Adobe's commercial desktop root store by default.

When Adobe Acrobat evaluates the document:

1. It reads the UIDAI signing certificate inside the PDF byte stream.
2. It attempts to trace the certificate path upward to a recognized root in its local trust database.
3. Because the sovereign Indian RCAI root certificate is absent from the local store, Adobe halts and displays: "Signature validity is UNKNOWN".

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What Does Long-Term Validation (LTV) Mean?

In digital signature cryptography, Long-Term Validation (LTV) ensures that a digitally signed document can be validated years or decades into the future, even if the signer's original certificate expires, or the issuing authority's revocation servers become unreachable.

Under the international PDF standard (ISO 32000-1 and PAdES ETSI EN 319 142), LTV is achieved by embedding a Document Security Store (/DSS) into the PDF. The /DSS dictionary contains:

• The complete chain of certificates (Signer Certificate, Sub-CA Certificate, and Root RCAI Certificate).
• The exact Certificate Revocation List (CRL) or Online Certificate Status Protocol (OCSP) response recorded at the time of validation.
• A cryptographic timestamp proving the signature was intact prior to certificate expiration.

Once an e-Aadhaar PDF has LTV embedded, any modern PDF viewer recognizes the trust path and displays a permanent green checkmark.

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Step-by-Step: How to Fix the Aadhaar Question Mark on Kagazo

Kagazo provides a private, zero-retention web verification engine that validates your Aadhaar PDF against official CCA India root certificates and embeds the LTV /DSS dictionary instantly.

Step 1: Download Your Fresh e-Aadhaar PDF

Log in to myaadhaar.uidai.gov.in using your Aadhaar number and OTP. Download your electronic Aadhaar PDF.

Step 2: Upload to Kagazo

1. Navigate to the Kagazo Home Page.
2. Drag and drop your downloaded e-Aadhaar PDF into the upload zone.
3. Because e-Aadhaar files are password protected by UIDAI, enter your PDF password.
   • Password Format: The first 4 letters of your name in CAPITAL letters followed by your 4-digit birth year (e.g., if your name is SURESH KUMAR and your birth year is 1990, enter SURE1990).

Step 3: Instant Ephemeral Verification

Click Verify Signature. In less than two seconds, Kagazo's backend engine:

• Decrypts the PDF in ephemeral RAM memory without ever saving bytes to disk.
• Audits the SHA-256 byte-range digest against UIDAI's public key.
• Validates the certificate chain against the National Informatics Centre (NIC Sub-CA) and RCAI.
• Embeds the LTV /DSS structure.

Step 4: Download Your Green-Ticked PDF

Click Download Verified PDF. Open the file in any PDF viewer on Android, iOS, Windows, or Mac. The yellow question mark is replaced by an authentic, tamper-evident green checkmark.

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Legal Validity Under the Information Technology Act, 2000

Under Section 35 and Section 4 of the Information Technology Act, 2000, electronic records authenticated through digital signatures issued by licensed Certifying Authorities hold identical legal standing to physical ink signatures.

Furthermore, under Section 85B of the Indian Evidence Act, 1872, courts and government authorities presume that a secure digital signature has not been altered since the specific point in time it was affixed. Kagazo preserves the full cryptographic integrity of the document, ensuring that your verified e-Aadhaar is 100% compliant and legally undeniable across all Indian banking, judicial, and administrative institutions.