Cancel your SLKK subscription by mail
To end a SLKK subscription you write to them: SLKK handles cancellations by post. Post for SLKK is handled in Zürich, Switzerland, which is where your letter is headed.
Let Postbye cancel SLKK 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 SLKK.
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- 2 SLKK cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel SLKK by mail
Start with your account details
Have the name and email on the account and, if you have one, an account or customer number to hand. The details in the letter need to match what SLKK has on file.
Prepare the letter
Because SLKK 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 8050 Zürich. Keep the tracking number it gives you.
Keep proof the letter arrived
The receipt dates your request. Look at your next statement for any SLKK charge after that date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your SLKK cancellation letter goes
The mailing address we hold for SLKK is Hofwiesenstrasse 370, 8050 Zürich, Switzerland.
Zürich is the delivery town, Switzerland; the postal code to quote is 8050.
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 SLKK, check these
- Use the same name and email as on the account. A mismatch can delay the request.
- 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.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel SLKK 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.
If a charge shows up after you cancelled, the letter and its receipt are what you put in front of the company or your bank.
SLKK cancellation at a glance
- How SLKK accepts cancellations
- By mailed letter
- Mailing address on file
- SLKK Hofwiesenstrasse 370 8050 Zürich Switzerland
- Country
- Switzerland
- Letter language
- German (template de)
- Added to the database
- June 24, 2026
- Data last checked
