Cancel your Diapason subscription by mail
Cancelling Diapason means putting it in writing; the company takes requests by mailed letter, and a tracked one leaves a clear record. The cancellation address on file for Diapason is in Lille, France.
Let Postbye cancel Diapason 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 Diapason.
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- 2 Diapason cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Diapason by mail
Gather your account details
Check the name and email on the account and, if you have one, an account or customer number before anything else. A request that does not match the account on file at Diapason is the easiest one to set aside.
Prepare the letter
Diapason is based in France, 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.
Post it with proof of delivery
Take the letter to the post office and ask for certified delivery to 59718 Lille. Keep the tracking number it gives you.
Hold on to the receipt
The receipt dates your request. Look at your next statement for any Diapason charge after that date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Diapason cancellation letter goes
Diapason lists CS 90006, 59718 Lille, France as its mailing address.
Copy the postal code 59718 exactly: it is what routes the letter to Hauts-de-France, France.
Your name, address and email appear in a short block labelled Titulaire du compte, Adresse de facturation enregistrée and E-mail enregistré, under the greeting “À qui de droit,”.
Prefer to write it yourself? Use our letter template
Every address we hold for Diapason, with the envelope wording
Before you cancel Diapason, check these
- Cancelling usually ends access at the end of the period you paid for, so you keep what you paid for until then.
- 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.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Diapason 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
Most subscriptions keep billing until someone tells the company to stop, and a dated letter is proof that somebody did.
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.
Diapason cancellation at a glance
- How Diapason accepts cancellations
- By mailed letter
- Mailing address on file
- Diapason CS 90006 59718 Lille France
- Country
- France
- Letter language
- French (template fr)
- Added to the database
- June 4, 2026
- Data last checked
