UDIN
...This UDIN System has been developed by ICAI to facilitate its members for verification and certification of the documents and for securing documents and authenticity thereof by Regulators....
https://udin.icai.org/
ICAI Released FAQs on UDIN (Revised 2025) TAXCONCEPT
...What is Unique Document Identification Number (UDIN)? Ans. Unique Document Identification Number (UDIN) is 18-Digits system generated unique number for every document certified/attested by Full time Practicing Chartered Accountants....
https://taxconcept.net/icai/icai-released-faqs-on-udin-revised-2025/
Home - UDIN
...The concept of UDIN (Unique Document Identification Number) is proposed to curb the malpractices of misleading the Authorities and Stakeholders by non-CMAs misrepresenting themselves as CMAs and attesting the Costing Data / documents / certificates. . ....
https://eicmai.in/udin/Home.aspx
Frequently Asked Questions on Unique Document Identification Number (UDIN)
...Ans. From 1st October, 2019 onwards, UDIN is mandatory on all sorts of Audit, Assurance, Attest and Review services, therefore UDIN is required for all Management Services....
https://icmai.in/upload/pd/FAQs_UDIN_22122023.pdf
UDIN (Unique Document Identification Number)
...UDIN is an 18-digit unique identification number that is generated for documents attested or certified by practicing Chartered Accountants. ICAI launched it to maintain the integrity, authenticity, and credibility of CA-certified documents....
https://www.efilingcompany.com/blog/udin-unique-document-identification-number/
FAQs on UDIN What is Unique Document Identification Number (UDIN)? Unique
...It indicates that the form uploaded by the CA with a UDIN has been accepted by the taxpayer and the UDIN linked to the form cannot be used for upload of another form or the revision or correction of the form already uploaded without its revocation....
https://www.incometax.gov.in/iec/foportal/sites/default/files/2021-05/FAQ_On_UDIN-8-12-20.pdf
UDIN: Verification, Format, Full Form, Helpline Number
...Know about UDIN purpose, full form, format, verification steps and helpline details. The ICAI has developed a method of securing the documents issued by a Chartered Accountant by issuing a UDIN....
https://cleartax.in/s/udin
UDIN (Unique Document Identification Number) by Chartered Accountants ...
...Chartered Accountants having full-time Certificate of Practice can register on UDIN Portal and generate UDIN by registering the certificates attested/certified by them....
https://www.caclubindia.com/articles/all-you-need-to-know-about-udin-by-chartered-accountants-in-practice-43632.asp
FAQs on Unique Document Identification Number (UDIN)
...With the mandate of generation of UDIN by all the Chartered Accountants in practice for all their certificates and documents and realization of the importance of the same by the stakeholders, UDIN is now being widely accepted as a Seal of authentication....
https://www.udin.icai.org/pdf/FAQs%20on%20UDIN%20(5th%20Edition).pdf
UDIN - Chartered Accountant Attestation - IndiaFilings
...Unique Document Identification Number (UDIN), as the name suggests, is an identification number that is generated for every document certified/attested by a Practicing Chartered Accountants....
https://www.indiafilings.com/learn/udin/