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CBIC in exercise of its power under section 151A of the Customs Act, 1962 directs that no search authorization, summons, arrest memo, inspection notices and  letters issued in the course of any enquiry shall be issued by any officer under the  Board to a taxpayer or any other person, on or after the 8th day of November, 2019 without a computer-generated Document Identification Number (DIN) being duly quoted  prominently in the body of such communication vide Circular No. 37/2019 dated 5th November 2019.

Circular No. 37/2019

F. No. 394/39(14)/2018-Commr. (Inv.-Cus.)
Government of India
Ministry of Finance
Department of Revenue
Central Board of Indirect Taxes and Customs



New Delhi, dated, 5th November 2019.


All Principal Chief Commissioners of Customs,
All Principal Director Generals,
All Chief Commissioners of Customs,
All Director Generals,
All Principal Commissioners of Customs
All Principal Additional Director Generals,
All Commissioners of Customs
All Additional Director Generals
All Joint Secretaries/Commissioners, CBIC.


Subject: Generation and quoting of Document Identification Number (DIN) on any communication issued by the officers of the Central Board of Indirect Taxes and Customs (CBIC) to tax payers and other concerned persons- reg.

In keeping with the Government’s objectives of transparency and accountability in indirect tax administration through widespread use of information technology,the CBIC is implementing a system for electronic (digital) generation of a Document Identification Number (DIN) for all communications sent by its offices to taxpayers and other concerned persons. To begin with,the DIN would be used for search authorization, summons, arrest memo, inspection noticesand letters issued in the course of any enquiry.This measure would create a digital directory for maintaining a proper audit trail of such communication. Importantly, it would provide the recipients of such communication a digital facility to ascertain theirgenuineness. Subsequently, the DIN would be extended to other communications. Also, there is a plan to have the communication itself bearing the DIN generated from the system.

2. The Board in exercise of its power under section 151A of the Customs Act, 1962 directs that no search authorization, summons, arrest memo, inspection notices and  letters issued in the course of any enquiry shall be issued by any officer under the  Board to a taxpayer or any other person, on or after the 8th day of November, 2019 without a computer-generated Document Identification Number (DIN) being duly quoted  prominently in the body of such communication.The digital platform for generation of DIN is hosted on the Directorate of Data Management (DDM)’s online portal “ in”

3. Whereas DIN is a mandatory requirement, in exceptional circumstances communications may be issued without an auto generated DIN. However, this exception is to be made only after recording the reasons in writing in the concerned file. Also, such communication shall expressly state that it has been issued without a DIN. The exigent situations in which a communication may be issued without the electronically generated DIN are as follows:-

(i) when there are technical difficulties in generating the electronic DIN, or

(ii) when communication regarding investigation/enquiry, verification etc. is required to issued at short notice or in urgent situations and the authorized officer is outside the office in the discharge of his official duties.

4. The Board also directs that any specified communication which does not bear the electronically generated DIN and is not covered by the exceptions mentioned in Para 3  above, shall be treated as invalidand shall be deemed to have never been issued.

5. Any communication issued without an electronically generated DIN in the exigencies mentioned in paras 3 above shall be regularized within 15 working days of its issuance, by:

(i) obtaining the post facto approval of the immediate superior officer as regards the justification of issuing the communication without the electronically generated DIN;

(ii) mandatorily electronically generating the DIN after post facto approval; and

(iii) printing the electronically generated pro-forma bearing the DIN and filing it in the concerned file.

6. In order to implement this new facility of electronically generating the DIN, all Principal Chief Commissioners /Principal Director Generals/Chief Commissioners/Director Generals shall ensure that all their authorized officers who have to electronically generate the DIN are immediately mapped as users in the System and are conversant with the process for auto-generating a DIN. In order to successfully add users for the DIN utility and enable them to electronically generate DINs, the following steps shall be followed:

(i) The details of officers to be added as users of the DIN Utility such as name, designation/Branch and official e-mail id shall be fedinto the System (the office of the officer being added will be auto populated);

(ii) The dashboard (Manage User) is provided with add/activate/inactivate/delete and edit options which can be availed for namely adding, activating, inactivating, editing and deleting the users as follows:

(a) Add:- Officers name/designation and branch can be added by selecting appropriate designation and branch from the drop down menu provided against the respective column.

(b) Activate:- Once the user activates the URL and provides the user name and password and OTP, the authorization will be processed by the system and shall be reflected as Green Radio button.

(c) Inactivate:-Any already added user who may be diverted on temporary basis to attend to some other assignment in the case of administrative exigency, can be deactivated for time being by dragging the Green Radio button to the left by which it will become red in colorshowing the user’s position as inactive. A confirmation e-mail will also be sent to the respective user.

(d) Edit:- This icon will always appear with Red Radio button (indicating the inactive position of the user) and is provided for modifying/editing the name/designation/branch/e-maid Id of the officer to be authorized.

(e) Delete:- This icon can be used for deleting the already added user profile if the officer is permanently transferred out from that office.

7. Officers who have been added as users in the DIN utility shall electronically generate DINs, as follows:

(i) Every authorized user shall receive an e-mail on his official e-mail Id after he/she is mapped into the DIN utility. This e-mail shall provide the user of his/her user name and password. The same e-mail shall also provide an URL online link.

(ii) After clicking on the said URL link, the user shallbe guided to the DIN utility within CBIC-Sanchar on the DDM’s online portal “”.

(iii) The user shall be required to submit his/her mobile number on the screen pagefor purposes of verification and then click “Get OTP” button for receiving a One Time Password (OTP) on the mobile.

(iv) The user shall login to the DIN utility by entering the OTP received.

(v) After successfully logging in, the user shall see the Dashboard displaying different categories, for total number of summons, search authorizations, inspection notices and arrest memos issued by the user. Initially, the figures under each category shall be ‘zero’.

(vi) The user shall click “Generate DIN” on the Menu Bar located at the left hand side of the screen and enter the details of the communication to be issued by choosing its category and selecting the appropriate title of the communication from the dropdown menu “Choose Document”

(vii) After filling in all the required information, and clicking on the “View & Save DIN” button, the user shall see a preview page. By clicking the “Back button”, mistakes or typographical errors, if any, can be rectified. Also, the user has the option of partially entering details in the System at a time and coming back later to retrieve the partially entered document (automatically saved in the System), fill in the remaining details, and generate a DIN on a later occasion.

(viii) The last step is to click on the “Generate DIN” button and a DIN shall be generated for that particular communication by the System. The generated DIN cannot be edited.

(ix) A new DIN shall be generated each time a request for generating it is submitted to the System.

(x) After the DIN is generated, the user shall print the page bearing the DIN and file it in the concerned file while also quoting the DIN on the communication.

DIN on the communication

8. The genuineness of the communication can be ascertained by recipient (public) by entering the CBIC- DIN for that communication in a window VERIFY CBIC-DIN on CBIC’s website Only in those cases where the DIN entered is valid, information about the office that issued that communication and the date of generation of its DIN would be displayed on the screen.

9. As aforementioned, in the first phase beginning on 8th day of November, 2019, the “Generate DIN” option shall be used for Search Authorizations, Summons, Inspection

Notices, Arrest Memos, and letters issued in the course of any enquiry. The format of the DIN shall be CBIC-YYYY MM ZCDR NNNNNN where,

(a) YYYY denotes the calendar year in which the DIN is generated,

(b) MM denotes the calendar month in which the DIN is generated,

(c) ZCDR denotes the Zone-Commissionerate-Division-Range Code of the field formation/Directorate of the authorized user generating the DIN,

(d) NNNNNN denotes 6 digit alpha-numeric system generated random number.

10. The electronic generation of DIN and its use in official communications to taxpayers and other concerned persons is a transformative initiative. Principal Chief Commissioners/Principal Director Generals / Chief Commissioners/Director Generals must become fully familiar with the process involved. They are also urged to ensure that adequate and proper training is provided to all concerned officers under their charge to ensure its successful implementation. It is reiterated that any specified document that is issued without the electronically generated DIN shall be treated as invalid and shall be deemed to have never been issued. Therefore, it is incumbent upon all officers concerned to strictly adhere to these instructions.

11. Hindi version to follows.

Commissioner (Inv.-Cus.)

Copy to:

i. Chairman, CBIC & All Members, CBIC

ii. DG Tax Payer Services, CBIC

iii.Pr. DG (Systems and Data Management)

iv. Webmaster- for uploading on the CBIC official website

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