When Indian citizens download official documents online — whether it is an e-Aadhaar card from UIDAI, an e-PAN from Protean/UTI, an Income Tax Return acknowledgement from CBDT, or an educational marksheet from DigiLocker — opening them in standard PDF readers frequently shows a confusing yellow question mark or "Signature Validity Unknown."
This occurs because consumer PDF viewers like Adobe Acrobat or mobile viewers do not come pre-configured with the root certificate chains of Indian Certifying Authorities (CAs). Manual installation of root certificates is technically complex, device-dependent, and frustrating for non-technical users.
VerifySign.in was built as an independent, browser-based utility that performs cryptographic signature validation on any government-issued signed PDF. It checks the integrity of the document, verifies the certificate against legitimate CA public roots, and embeds Long-Term Validation (LTV) data with a permanent green checkmark.
The resulting PDF displays as authentic and valid across all major desktop and mobile PDF viewers without requiring any user configuration.
We understand how sensitive personal identification and tax documents are. That is why VerifySign.in operates on a strict zero-permanent-storage architecture: all files are processed in-memory and automatically destroyed within 2 hours. We never inspect, share, or monetize document contents.
Upload your signed PDF for an instant free check.