The circular clarifies the requirement of quoting the Document Identification Number (DIN) in communications sent via eOffice application. CBIC has introduced an online facility at https://verifydocument.cbic.gov.in that allows taxpayers and concerned persons to verify the authenticity of documents by entering the ‘Issue number’. With this utility in place, a separate DIN is no longer required on communications dispatched using the public option in eOffice, as the Issue number itself will be treated as the DIN. However, for all other communications outside the eOffice public option, the mandatory quoting of DIN remains unchanged.