The Employees' Provident Fund Organisation (EPFO) is one of India's largest social security institutions, managing provident fund accounts for crores of salaried employees. EPFO issues several important documents in PDF format — and all of them carry digital signatures that PDF readers display as "signature validity unknown." If you've been confused by this warning on your EPFO documents, read on.
PF Passbook PDF: The detailed statement of your Provident Fund account contributions and interest, downloadable from the EPFO member portal (passbook.epfindia.gov.in). Carries an EPFO/NIC digital signature.
UAN (Universal Account Number) Card: The official UAN card PDF issued through the EPFO portal carries a digital signature certifying the UAN assignment.
PF Settlement Letters: When you make a PF withdrawal claim, EPFO issues a settlement confirmation PDF with a digital signature confirming the amount released.
Pension Calculation Statement: Under EPS (Employees' Pension Scheme), EPFO issues pension-related documents that carry digital signatures.
KYC Approval Letters: EPFO's KYC update confirmations may also be issued as digitally signed PDFs.
EPFO uses NIC's PKI infrastructure to sign its PDF documents. NIC is a Certifying Authority under India's IT Act, 2000, but it is not listed in the Adobe Approved Trust List (AATL) that Adobe Acrobat and similar readers rely on. As a result, any NIC-signed document — including all EPFO PDFs — will show a "signature validity unknown" warning in your PDF reader. This is a standard display issue, not a sign that the document is fraudulent.
VerifySign.in has pre-integrated the NIC certificate chain — including the certificates used by EPFO systems — into its verification engine. Upload any EPFO PDF and VerifySign.in will confirm whether the NIC digital signature is valid, who signed it, and when. The verification is free and takes under 10 seconds, with no software to install.
Step 1: Log into the EPFO member portal and download your PF passbook PDF, UAN card, settlement letter, or any other EPFO document.
Step 2: Open VerifySign.in.app on any device — desktop or mobile.
Step 3: Upload the EPFO PDF. VerifySign.in identifies the NIC/EPFO signature and initiates a cryptographic verification.
Step 4: Review the verification result — signer identity, signing date, and validity status. Download a verified LTV-embedded copy (₹49) if needed for official submission.
Home Loan and Other Bank Loans: Banks routinely ask for PF passbook statements as proof of employment and income stability. Lending officers may require the digital signature on the passbook to be verifiable.
Legal Proceedings: In cases of wrongful termination, labour disputes, or insurance claims, the PF passbook or settlement letters may be submitted as legal evidence. A verified digital signature strengthens the document's evidentiary value.
Employer Verification: When switching jobs, a new employer's HR team may ask for the PF passbook to verify previous employment history and contributions. A digitally verified document eliminates doubts about authenticity.
PF Withdrawal Claims: If your settlement letter needs to be shared with a financial advisor, tax consultant, or family member as proof of PF withdrawal, verifying the digital signature first adds an important layer of authenticity.
Instant digital signature verification for any government PDF — free, secure, no software needed.
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