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Submitting complaints and inquiries in the area of telecommunications

As a customer of an Internet, mobile or fixed network provider, you can find out about your rights and submit inquiries and complaints to the Federal Network Agency.

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Bundesnetzagentur für Elektrizität, Gas, Telekommunikation, Post und Eisenbahnen - Referat 230 - Schlichtungsstelle Telekommunikation

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Tulpenfeld 4
53113 Bonn

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Postfach 80 01

53105 Bonn

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Procedure details

The Federal Network Agency has the task of ensuring that telecommunications companies comply with the regulations on customer protection laid down in the Telecommunications Act (TKG).

If you have a concern about your Internet, mobile or landline connection, you can contact the Federal Network Agency. The Federal Network Agency

  • informs you about your rights as a customer and
  • supports you in certain individual cases in clarifying your concerns with telecommunications companies.

You can submit a complaint or an inquiry to the Federal Network Agency. The Federal Network Agency will then examine your request.

The Federal Network Agency can support you, for example

  • in the event of problems in connection with a change of provider, such as an interrupted supply or
  • problems with moving your connection or
  • with issues relating to the basic supply of telecommunications services. The universal service means that you are entitled to a landline connection.

In certain cases, the Federal Network Agency can also clarify questions in connection with your contract, for example regarding contract transparency, the content of a bill or an itemized bill.

  • You are a customer of a telecommunications company and

  • Your request concerns

    • regulations on customer protection under the Telecommunications Act (TKG) or
    • the basic provision of telecommunications services or
    • other European Union regulations on roaming, European international calls and text messages or net neutrality.

  • in the event of a change of provider: your supply has been unintentionally interrupted or there is a risk of interruption for longer than one day.

  • Required Documents

    Varies depending on the circumstances, for example:

    • Contract and applicable General Terms and Conditions (GTC) of the provider
    • Order confirmation
    • Order for the relocation of your telecommunications connection
    • Order for number porting
    • Letter of termination or confirmation of termination
    • Test and measurement logs of your broadband measurement
    • disputed invoices and itemized bills

    Further information on the required documents can be found in the contact forms.

You can submit inquiries or complaints online, electronically or in writing. Please preferably use the online contact form.

To submit your inquiry or complaint online:

  • On the Federal Network Agency's website, select the topic that matches your request.

  • Complete the contact form in full:

    • Please enter your e-mail address. Information about your request will be sent to this e-mail address.
    • Attach any relevant documents, for example your letters with the providers. If possible, please summarize these in a PDF file.
    • Give us your consent to forward your request to the companies concerned so that we can clarify the facts of the case for a specific purpose.

  • The Federal Network Agency will check whether there are any possibilities for intervention or support

  • If so, the Federal Network Agency usually contacts the companies involved with the facts of the case.

  • You will receive a reply from the Federal Network Agency to your inquiry or complaint, usually by e-mail or post.

If you wish to submit your inquiry or complaint by De-Mail, e-mail or post:

  • Please use the PDF form provided for this purpose and complete it. Note: The additional explanations from the online contact form are not available here
  • Send your inquiry or complaint to the Federal Network Agency addresses provided.
  • The further procedural steps are the same as for the online procedure.

The procedure is free of charge.

There is no deadline for submitting inquiries or complaints.

For billing issues, please note the complaint period of 8 weeks stated on your invoice. For reasons of proof, it is advisable to send complaints to the provider by registered mail.

In the event of a supply interruption due to a change of supplier, the Federal Network Agency will review your request within a short period of time, usually within 3 to 5 working days.

For other requests, the processing time can be 2 to 6 weeks, depending on the subject area.

The Federal Network Agency assumes that you have already reported your concern to your telecommunications provider so that they can investigate the matter as quickly as possible.

Status: 09.03.2025
Editorially responsible for prodecure description: Bundesministerium für Wirtschaft und Energie
Source: Federal Portal