TL;DR for CAs
- UDIN authenticates certificates and reports issued by CAs.
- Generate before signing/sharing documents.
- Incorrect document type mapping can cause compliance issues.
What it is
Unique Document Identification Number (UDIN) is ICAI's mechanism to verify CA-signed documents.
Who it applies to
Members in practice issuing attest/assurance/certificates.
Key provisions
- Mandatory document categories
- Portal generation process
- Validity and revocation concepts
Practical tips for CAs
Integrate UDIN step into delivery checklist. Keep a UDIN register.
Common mistakes
Post-facto UDIN; wrong financial year tags; sharing drafts with UDIN.
For general guidance only. Verify with the latest Finance Act, GST notifications, and ICAI guidance notes before advising clients.