Filling in adaptive forms

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In addition to traditional PDF forms, now also makes available adaptive forms, i.e. digital forms that adapt to both computers and mobile devices (smartphones and tablets). You can therefore fill in your form on the device of your choice.

Once you have completed the online form, a PDF document is generated based on the information you have entered. You can then download this document, sign it and send it to the relevant administration or public body.

Although adaptive forms are dynamic forms that adapt to your responses, they are not linked to You can identify adaptive forms by the logo in the header bar on the left.


Downloading and installing Adobe Acrobat Reader

Once you have filled in an adaptive form, a PDF document containing the data you entered is generated. To be able to download this PDF document onto your computer, you must first download and install Adobe Acrobat Reader.

Download Adobe Acrobat Reader

For more information on downloading and installing the software on your computer, please consult the following articles on the Adobe support site:

Browser configuration

To avoid the PDF document being displayed incorrectly or not at all, you should ensure that it is not opened in a browser. It is recommended that you first save the form on your computer and then open it in Adobe Acrobat Reader.

If you would like to know how to configure the browser of your choice so that you can save files on your computer, please consult the help page on the website of the browser supplier concerned:


Adobe Acrobat Reader is free of charge.

How to proceed

Filling in an adaptive form

  1. Go to
  2. Find the information page that corresponds to the procedure you want to carry out.
  3. Click on 'Online services and forms'.
  4. Click on the desired procedure to begin.
  5. After having answered the security question and accepted the terms and conditions, click on 'Continue'.
  6. Fill in at least the mandatory fields marked with an asterisk (*).
  7. Advance through the form by clicking on 'Next step'.
  8. When you have finished entering your data, click on 'Download PDF document'.
  9. You can then:
    • print the PDF document and sign it by hand; or
    • open it in Adobe Acrobat Reader and sign it electronically.

For electronic signatures, you must always use an authentication and electronic signature certificate (such as a LuxTrust SmartCard or a Luxembourg eID). If you do not have such a certificate, you must print out the form and sign it by hand.

Interactive and flat forms

In addition to adaptive forms, you can also find standard PDF forms on These can be either interactive or flat. For more information, please consult the relevant help page:

Downloading and filling in a PDF form

Forms with eTracking

For certain administrative procedures, PDF forms with the eTracking option are also available for download. For more information, please consult the relevant help page:

Requesting an eTracking number for a procedure


Related content

You may also find the following pages useful:

Downloading and filling in a PDF form Requesting an eTracking number for a procedure

Additional information

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