Cancel your 1 Und 1 subscription by mail
For 1 Und 1 the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. Letters to 1 Und 1 go to Montabaur, Germany.
Let Postbye cancel 1 Und 1 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.
Money-back guarantee within 10 business days.
Postbye is not affiliated with 1 Und 1.
- 4.8 from 2,931 reviews
- 3 1 Und 1 cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel 1 Und 1 by mail
Gather your account details
1 Und 1 will look your account up from what the letter says, so check the account number, the phone number or service address being cancelled and the name on the account first.
Draft the request
Because 1 Und 1 is dealt with in German, the letter is written in German (template de). Subject: “Betreff: Kündigungsanfrage – [your name]”. It requests an end to the subscription and to every further charge, plus written confirmation.
Mail the letter with a receipt
Send it certified to Montabaur, Germany, copying the address from the next section letter for letter, and keep the receipt slip.
Keep the proof of delivery
File the receipt with the letter. A 1 Und 1 charge dated after delivery is the one to dispute, and these two documents are what you quote.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your 1 Und 1 cancellation letter goes
1 Und 1 can be reached by post at Elgendorfer Straße 57, 56410 Montabaur, Germany.
Postal code 56410 places the address in Rheinland-Pfalz, Germany.
Your details go in a block headed by Kontoinhaber, Hinterlegte Rechnungsadresse and Hinterlegte E-Mail-Adresse, and the opening line is “Sehr geehrte Damen und Herren,”.
Prefer to write it yourself? Use our letter template
Every address we hold for 1 Und 1, with the envelope wording
Before you cancel 1 Und 1, check these
- Check for an early-termination fee or a remaining equipment balance before the cancellation date.
- If you are moving to another provider, keep the line active until the new service works, then cancel.
- Name the exact line or service address. Accounts with several lines can leave one of them running.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel 1 Und 1 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.
Cancelling a phone or internet plan
Phone and internet providers tie cancellation to contracts, equipment balances and notice periods, so the request should name the exact line or service and ask for a final bill in writing.
A phone call leaves nothing behind; a letter leaves a copy, a date and a delivery receipt.
1 Und 1 cancellation at a glance
- How 1 Und 1 accepts cancellations
- By mailed letter
- Mailing address on file
- 1 Und 1 Elgendorfer Straße 57 56410 Montabaur Germany
- Country
- Germany
- Letter language
- German (template de)
- Category (from the company name)
- Phone & internet
- Added to the database
- May 19, 2026
- Data last checked
