Cancel your IHHA subscription by mail
For IHHA the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. The cancellation address on file for IHHA is in Wien, Austria.
Let Postbye cancel IHHA 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 IHHA.
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- 3 IHHA cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel IHHA by mail
Start with your account details
Put the name and email on the account and, if you have one, an account or customer number in front of you before you write: the request to IHHA is only as good as the details it quotes.
Prepare the letter
Because IHHA 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 it with tracking
Take the letter to the post office and ask for certified delivery to 1100 Wien. Keep the tracking number it gives you.
Keep proof the letter arrived
File the receipt with the letter. A IHHA 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 IHHA cancellation letter goes
Written requests to IHHA go to Knöllgasse 33, 1100 Wien, Austria.
The envelope is going to Wien, Austria, so the postcode 1100 must be on the front.
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
Before you cancel IHHA, check these
- Write well before the next billing date. A request that arrives after it can leave one more charge on your statement.
- If an app store or phone carrier bills you, the company cannot cancel it. Cancel with that partner as well.
- Cancelling usually ends access at the end of the period you paid for, so you keep what you paid for until then.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel IHHA 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 mailed letter is slower than a phone call but it is the version that proves what you asked for and when.
IHHA cancellation at a glance
- How IHHA accepts cancellations
- By mailed letter
- Mailing address on file
- IHHA Knöllgasse 33 1100 Wien Austria
- Country
- Austria
- Letter language
- German (template de)
- Added to the database
- June 19, 2026
- Data last checked
