The National Security Authority (hereinafter referred to as ‘the NSA’) may be electronically communicated by means of a data box information system or by means of an electronic mailroom. In some cases, it is also possible to communicate through the NBÚ Portal.

  • The NSA's data box ID is: h93aayw
  • NSA portal: http://portal.nbu.gov.cz
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  • Electronic address of the electronic mailroom: This email address is being protected from spambots. You need JavaScript enabled to view it.
  • E-mail address for inquiries and communication with journalists: This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Address for personal submission of electronic data on technical media:

    National Security Authority
    Na Popelce 2/16
    150 06 Prague 5

  • Registrar's office hours:

    Monday and Wednesday: 8.00 - 17.00
    Tuesday and Thursday: 8.00 - 14.00
    Friday: 8.00 - 13.00

Data messages

For communication with the NSA via the information system of data boxes in the field of security proceedings on the issue of a certificate of natural person, entrepreneur and proof of security capability, enter the text "Security proceedings" in the data message in the field "Case"; in the case of change reporting, enter the text "Security proceedings - change reporting" in the field "Case".

If you are responding to a document of the Office, please also indicate in the data message the reference number by which this document was marked. It is recommended to enter the reference number in the field ‘Your file reference and reference number’.

Further details of the use of the information system of data boxes for communication with the Office are given here.

Electronic mailroom

The electronic mailroom is intended for receiving electronic data by means of e-mail messages delivered to the Office in the scope of list, for which delivery will be confirmed according to rules. For other communication with the organizational units of the Office can be used these contacts.

E-mail Delivery Confirmation Rules

The delivery of the e-mail message is confirmed to the sender, if it is possible to detect the e-mail address of the sender from the received e-mail message, during the office hours of the mailroom.

Template for acknowledgement of receipt of an e-mail message from the Office

Hello there!

Your submission in case xxxxxxxxxx, which you sent xx.xx.xxxx in xx.xx.xx to the email address This email address is being protected from spambots. You need JavaScript enabled to view it., was accepted by the electronic filing office for further processing after checking all the elements. The report on the receipt of the report and the checking of electronic signatures is sent to you as an annex to this report under the title prot-xxxxxxxx.pdf.

To open PDF files, you need Adobe Acrobat Reader, which you can download and install for free by clicking on this link: http://www.adobe.com/products/acrobat/readstep2.html

This report does not tell you whether and how your submission has been handled. It only informs that it has been accepted by the electronic filing office for further processing.

Thank you for your trust.

Electronic mailroom NBÚ

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This message was sent by automatic mailroom system. This machine does not accept mail, so it is useless to try to respond to this message. If you would like to contact us, please use one of the contacts listed on the Office's website http://www.nbu.cz

Model confirmatory message for an unauthorised attachment type

Hello there!

On xx.xx.xxxx, you sent a message with the subject xxxxxxxxxx to the email address This email address is being protected from spambots. You need JavaScript enabled to view it.. When checking the message, it was found that it contained unauthorized attachment types! The allowed attachment types (suffixes) are xxxxxxxxxxxxxx. For this reason, the electronic report was not accepted or forwarded for further processing. The report review report is attached to this report under the title prot-xxxxxxxxx.pdf.

To open PDF files, you need, for example, Adobe Acrobat Reader, which you can download and install for free by clicking on the following link: http://www.adobe.com/products/acrobat/readstep2.html

Thank you for your trust.

Electronic mailroom NBÚ

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This message was sent by automatic mailroom system. This machine does not accept mail, so it is useless to try to respond to this message.

Template for malicious code confirmation message

Hello there!

On xx.xx.xxxx, you sent a message with the subject xxxxxxxxxxxxxx to This email address is being protected from spambots. You need JavaScript enabled to view it.. When checking the message, it was found to contain a malicious code (virus)! For this reason, the electronic report was not accepted or forwarded for further processing. We are sending you the report review report as an annex to this report, titled prot-xxxxxxx.pdf.

To open PDF files, you need, for example, Adobe Acrobat Reader, which you can download and install for free by clicking on the following link: http://www.adobe.com/products/acrobat/readstep2.html

Thank you for your trust.

Electronic mailroom NBÚ

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This message was sent by automatic mailroom system. This machine does not accept mail, so it is useless to try to respond to this message.

Technical Parameters

  • permitted types of attachments accepted by electronic mailboxes or data boxes:
    The Office shall accept only the types of attachments delivered by electronic mailboxes or data boxes listed in the following list:
    • PDF (PDF/A)
    • DOC, DOCX, RTF, XLS, XLSX, PPT
    • JPEG,GIF, PNG, TIFF
    • MP2 (according to MPEG-1 Audio Layer II or MPEG-2 Audio Layer II), MP3 (according to MPEG-1 Audio Layer III or MPEG-2 Audio Layer III), WAV
    • MPEG4
    • XML (please note that the Office only accepts questionnaires in electronic form in xml format that are not encrypted).
    • ZFO

      In case of doubt, ask our electronic mailroom, where our employees will tell you whether the format is acceptable.
      After detecting the presence of an unauthorised attachment type, the registrar system deletes the content of the message and processes only the metadata. If the sender can be identified from the received message, a communication of an unauthorised attachment type is sent to the sender.
  • portable technical media on which electronic data may be transmitted:
    Data is received on any portable USB storage device without the need to install the software needed to access stored data, CD/DVD, CF/CFII, SM, MF, MMC, MS/Duo, SDHC/SDXC + micro
  • Procedure in case of detection of malicious code on received message by electronic mailbox or data box:
    A message that has been detected as malicious code, or if it cannot be displayed in a user-perceivable manner, will not be processed. After detecting the presence of malicious code or unreadability, the registrar system removes the content of the message and processes only metadata. If the sender can be detected from the received message, a message is sent to the sender about the detection of the malicious code or the illegibility of the document.
  • Procedure in case of detection of malicious code on a portable technical medium:
    The portable technical medium will be rejected and the files on it will not be taken over by an employee of the Office.
  • Certificate used and its serial number:
    NBÚ-EPV (340760180), certificate validity up to 26. 2. 2019
  • Qualified, commercial and system certificates issued by a certification authority eIdentity.

List of legal regulations under which legal acts in electronic form may be performed against the Office and the particulars of such acts, in particular the particulars relating to the use of an advanced electronic signature

  • Application for certification of a technical device pursuant to Section 47 of Act No 412/2005 on the protection of classified information and on security capability, as amended.
  • Application for certification of an information system pursuant to Section 48 of Act No 412/2005 on the protection of classified information and on security capacity, as amended.
  • Submission of a report on unauthorised handling of classified information pursuant to Section 69(1)(k) of Act No 412/2005 on the protection of classified information and on security capacity, as amended.
  • A request for information on the basis of Act No 106/1999 on free access to information must, if it is in electronic form, be submitted via an electronic mailroom. In accordance with Section 14(2) of Act No 106/1999 on free access to information, it must be clear from this request that it is submitted within the meaning of this Act.
  • Submissions made under Act No. 500/2004 Coll., the Code of Administrative Procedure, must be signed with an advanced electronic signature based on a qualified certificate issued by an accredited provider of certification services.
  • Submission of an application for the issue of a public document, notification of changes in the area of personnel security, security capacity and industrial security, submission of an application for the issue of a certificate for foreign power, notification of loss, theft, damage to a public document, sending a copy of the Declaration of the Entrepreneur pursuant to Act No. 412/2005 Coll., on the protection of classified information and on security capacity, as amended.

Questions about e-Communication

Your questions regarding the operation of the electronic mailroom or the procedure for using the information system of data boxes should be sent to the following e-mail address: This email address is being protected from spambots. You need JavaScript enabled to view it., where appropriate, to the postal address of the Office.