Cancel your A1 subscription by mail
For A1 the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. Our database has A1's mailing address in Wien, Austria.
Let Postbye cancel A1 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 A1.
- 4.8 from 2,931 reviews
- 2 A1 cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel A1 by mail
Start with your account details
Before writing, collect the account number, the phone number or service address being cancelled and the name on the account. A1 can only act on a request it can match to an account.
Set out the request
Postbye drafts the request in German, the language of Austria, with “Betreff: Kündigungsanfrage – [your name]” as the subject line. It asks A1 to close the subscription, stop billing and confirm in writing.
Send it by certified mail
Send the letter to the Wien mailing address shown below by certified mail. Keep the tracking number safe.
Keep the delivery receipt
File the receipt with the letter. A A1 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 A1 cancellation letter goes
Written requests to A1 go to Lassallestraße 9, 1020 Wien, Austria.
Postal code 1020 places the address in Wien, Austria.
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
Before you cancel A1, check these
- Ask for a final bill in writing and return any rented equipment by tracked mail.
- 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.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel A1 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 mailed letter is slower than a phone call but it is the version that proves what you asked for and when.
A1 cancellation at a glance
- How A1 accepts cancellations
- By mailed letter
- Mailing address on file
- A1 Lassallestraße 9 1020 Wien Austria
- Country
- Austria
- Letter language
- German (template de)
- Category (from the company name)
- Phone & internet
- Added to the database
- May 19, 2026
- Data last checked
