Unique Document Identification Number
Unique Document Identification Number (UDIN) is an 18-digit number assigned to documents attested by practicing Chartered Accountants. It is a system generated unique number that is generated for every new document.
The use of UDIN for all the certificates issued by CAs has been mandated by Institute of Chartered Accountants of India (ICAI), from 1st July 2019. The UDIN generated by CAs can be searched in the UDIN portal by entering the name, contact and Mail address of the person seeking information.
The first 2 digits represents the current financial year. The next 6 digits are the Membership No. of the CA who has generated the ID. The last 10 digits are system generated random number. The Income Department would validate the UDIN of CAs when they upload audit reports, with the Institute of Chartered Accountants of India (ICAI).
