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Congstar contract - how it works

  • Jan 23, 2026
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You can use your Congstar contract is not longer, you can terminate this. We will show you how to do it.

Congstar: termination of contract

With Congstar you can cancel your contract in several Ways. However, you need to pay attention to some things.
  • The notice must include either your customer number or your contract number. They have completed several contracts, the contract number is essential. Ensure you comply with your notice period. The Letter may look like this:
  • "Ladies and gentlemen, I hereby announce my Congstar contract in a timely manner. Please send me a written confirmation of the termination. With kind Regards,"
  • The easiest way is via e-Mail is. Send your notice of cancellation to "kundenservice@congstar.de".
  • Alternatively, you can send your notice of termination by letter: congstar GmbH, Postfach 1165, 61466 Kronberg. If you want to be on the safe side, then select the Post Option "registered letter with return receipt". So you know that your termination is also really arrived.
  • A little cheaper because this is all done by Fax for 20 cents from a landline on 0180 6 22 17 77.

DSL termination letter online create

You have a DSL contract from Congstar and want to cancel it, so you can also use a pre-notice of termination form from the Internet. Such templates can be found, for example, on aboalarm.
Like the Glossybox cancel read in this practical tip.

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