What is a UDIN?
Reviewed by Ranga & Company
UDIN: A UDIN is an 18-character number a chartered accountant generates on ICAI's portal for every certificate, audit report or attestation they sign, so anyone can verify the document is genuine.
At a glance
- Issued by
- ICAI's UDIN portal, generated by the signing CA
- Mandatory for
- Certificates, audit reports, tax audit reports, attestations
- Verify at
- udin.icai.org
- Purpose
- Stops fake certificates and signatures
Why it matters to you
Banks, visa offices, tax authorities and government departments verify UDINs. A net-worth certificate for a visa or a turnover certificate for a tender without a valid UDIN can be rejected outright.
How to verify a UDIN
- Go to udin.icai.org and choose 'Verify UDIN'
- Enter the UDIN, the document date and the CA's membership number
- Check that the document type and figures match what you received
Common mistakes
- Accepting a certificate without a UDIN
- Not checking that the UDIN details match the certificate's figures
Frequently asked questions
Is UDIN mandatory on CA certificates?
Yes. ICAI requires a UDIN for every certificate, audit report and attestation signed by a practising CA.
How do I verify a CA certificate?
Check its UDIN on udin.icai.org using the date and the CA's membership number.
Can a tax consultant issue a UDIN?
No. Only a practising chartered accountant can generate a UDIN for documents they sign.
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