Cancel your Mcdef subscription by mail
Mcdef accepts written cancellation requests by post, which makes certified mail the strongest proof that you asked. Mcdef receives written requests in Paris, France.
Let Postbye cancel Mcdef 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 Mcdef.
- 4.8 from 2,931 reviews
- 2 Mcdef cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Mcdef by mail
Get your account details together
Before writing, collect the name and email on the account and, if you have one, an account or customer number. Mcdef can only act on a request it can match to an account.
Prepare the letter
Postbye drafts the request in French, the language of France, with “Objet : Demande d'annulation – [your name]” as the subject line. It asks Mcdef to close the subscription, stop billing and confirm in writing.
Send it by certified mail
Take the letter to the post office and ask for certified delivery to 75017 Paris. Keep the tracking number it gives you.
Keep the proof of delivery
It shows the date Mcdef received your letter. Check your next statement: no Mcdef charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Mcdef cancellation letter goes
Mcdef lists Rue Georges Picquart 4, 75017 Paris, France as its mailing address.
The envelope is going to Paris in Île-de-France, France, so the postcode 75017 must be on the front.
Your details go in a block headed by Titulaire du compte, Adresse de facturation enregistrée and E-mail enregistré, and the opening line is “À qui de droit,”.
Prefer to write it yourself? Use our letter template
Before you cancel Mcdef, check these
- 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.
- Use the same name and email as on the account. A mismatch can delay the request.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Mcdef 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 letter is the formal route: it states the request in writing, carries a date and, sent by certified mail, comes with proof of delivery.
Mcdef cancellation at a glance
- How Mcdef accepts cancellations
- By mailed letter
- Mailing address on file
- Mcdef Rue Georges Picquart 4 75017 Paris France
- Country
- France
- Letter language
- French (template fr)
- Added to the database
- June 4, 2026
- Data last checked
