Cancel your Winsim subscription by mail
For Winsim the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. Winsim receives written requests in Maintal, Germany.
Let Postbye cancel Winsim 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 Winsim.
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- 2 Winsim cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Winsim by mail
Find your account details
Check the account number, the phone number or service address being cancelled and the name on the account before anything else. A request that does not match the account on file at Winsim is the easiest one to set aside.
Set out the request
Winsim is based in Germany, so the letter goes out in German, built from our German template. Subject line: “Betreff: Kündigungsanfrage – [your name]”. It asks for the subscription to end, for further charges to stop and for written confirmation.
Post it with proof of delivery
Mail the letter by certified mail to the Maintal address in the next section, and keep the tracking number.
Save the tracking record
It shows the date Winsim received your letter. Check your next statement: no Winsim charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Winsim cancellation letter goes
Winsim takes its post at Wilhelm-Röntgen-Straße 1-5, 63477 Maintal, Germany, which is where a cancellation letter belongs.
Copy the postal code 63477 exactly: it is what routes the letter to Hessen, 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
Before you cancel Winsim, check these
- 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.
- Ask for a final bill in writing and return any rented equipment by tracked mail.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Winsim 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.
Winsim cancellation at a glance
- How Winsim accepts cancellations
- By mailed letter
- Mailing address on file
- Winsim Wilhelm-Röntgen-Straße 1-5 63477 Maintal 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
