Cancel your Dyadis subscription by mail
For Dyadis the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. Our database has Dyadis's mailing address in Watermaal-Bosvoorde, Belgium.
Let Postbye cancel Dyadis 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 Dyadis.
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- 3 Dyadis cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Dyadis by mail
Start with your account details
Start with the name and email on the account and, if you have one, an account or customer number, so the request to Dyadis names the right account the first time.
Draft the request
Dyadis is based in Belgium, so the letter goes out in French, built from our French template. Subject line: “Objet : Demande d'annulation – [your name]”. It asks for the subscription to end, for further charges to stop and for written confirmation.
Mail the letter with a receipt
Mail the letter by certified mail to the Watermaal-Bosvoorde address in the next section, and keep the tracking number.
Keep the proof of delivery
Once the letter is delivered, the date on the receipt is the date Dyadis was told. Compare it with your statements over the next billing cycle.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Dyadis cancellation letter goes
The mailing address we hold for Dyadis is Steenweg op Sint-Jansberg 2, 1170 Watermaal-Bosvoorde, Belgium.
The envelope is going to Watermaal-Bosvoorde in Brussel, Belgium, so the postcode 1170 must be on the front.
The letter is addressed “À qui de droit,” and its details block uses the labels Titulaire du compte, Adresse de facturation enregistrée and E-mail enregistré.
Prefer to write it yourself? Use our letter template
Before you cancel Dyadis, 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 Dyadis 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
Subscriptions renew automatically, and a written request is the clearest record that you asked to stop it before the next billing date.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
Dyadis cancellation at a glance
- How Dyadis accepts cancellations
- By mailed letter
- Mailing address on file
- Dyadis Steenweg op Sint-Jansberg 2 1170 Watermaal-Bosvoorde Belgium
- Country
- Belgium
- Letter language
- French (template fr)
- Added to the database
- June 24, 2026
- Data last checked
