Cancel your Congstar subscription by mail
Cancelling Congstar means putting it in writing; the company takes requests by mailed letter, and a tracked one leaves a clear record. Congstar receives written requests in Kronberg, Germany.
Let Postbye cancel Congstar for you
We write your letter, mail it by certified mail the next business day, and confirm when the cancellation went through. You keep the signed proof.
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Postbye is not affiliated with Congstar.
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- 3 Congstar cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Congstar by mail
Note your account details
Start with the name and email on the account and, if you have one, an account or customer number, so the request to Congstar names the right account the first time.
Write your request
Postbye writes the letter in German from our German template, because Congstar's address is in Germany. It opens with the subject line “Betreff: Kündigungsanfrage – [your name]” and asks Congstar to end the subscription, stop all further charges and confirm in writing.
Mail the letter with a receipt
Mail the letter by certified mail to the Kronberg address in the next section, and keep the tracking number.
Hold on to the receipt
Once the letter is delivered, the date on the receipt is the date Congstar was told. Compare it with your statements over the next billing cycle.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Congstar cancellation letter goes
For a letter to Congstar, use Postfach 1165, 61466 Kronberg, Germany.
“Postfach 1165” is a post-office box or mail-sorting line, so it takes post and not couriers: certified mail is the right way to reach it.
The letter is addressed “Sehr geehrte Damen und Herren,” and its details block uses the labels Kontoinhaber, Hinterlegte Rechnungsadresse and Hinterlegte E-Mail-Adresse.
Prefer to write it yourself? Use our letter template
Every address we hold for Congstar, with the envelope wording
Before you cancel Congstar, check these
- Check your next statement: no charge should appear after the cancellation date.
- Look for annual or multi-month plans. A plan paid in advance usually runs to the end of the period you paid for.
- Write well before the next billing date. A request that arrives after it can leave one more charge on your statement.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Congstar for you
We write your letter, mail it by certified mail the next business day, and confirm when the cancellation went through. You keep the signed proof.
How cancelling by mail works
A subscription ends when the company records your request, not when you stop using it, and a letter is the record you can show later.
A letter is the formal route: it states the request in writing, carries a date and, sent by certified mail, comes with proof of delivery.
Open congstar.de and look at the billing section: if a partner collects the payment, the request has to reach them too.
Congstar cancellation at a glance
- How Congstar accepts cancellations
- By mailed letter
- Mailing address on file
- Congstar Postfach 1165 61466 Kronberg Germany
- Country
- Germany
- Letter language
- German (template de)
- Website
- congstar.de
- Added to the database
- May 19, 2026
- Data last checked
