Cancel your Fiducial subscription by mail
Fiducial takes cancellation requests by mailed letter, so a dated certified-mail letter is the record that counts. The cancellation address on file for Fiducial is in Courbevoie, France.
Let Postbye cancel Fiducial 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 Fiducial.
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- 2 Fiducial cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Fiducial by mail
Start with your account details
Fiducial will look your account up from what the letter says, so check the name and email on the account and, if you have one, an account or customer number first.
Put the request in writing
Because Fiducial is dealt with in French, the letter is written in French (template fr). Subject: “Objet : Demande d'annulation – [your name]”. It requests an end to the subscription and to every further charge, plus written confirmation.
Mail it with tracking
Send the letter to the Courbevoie mailing address shown below by certified mail. Keep the tracking number safe.
Keep the proof of delivery
Delivery confirmation is your evidence that Fiducial was asked. Watch the next statement or two for any further Fiducial charge.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Fiducial cancellation letter goes
Fiducial lists Rue du Capitaine Guynemer 41, 92400 Courbevoie, France as its mailing address.
The postcode 92400 belongs to Île-de-France, France, so this is where the envelope is delivered.
Inside, the salutation reads “À qui de droit,”, followed by your details under Titulaire du compte, Adresse de facturation enregistrée and E-mail enregistré.
Prefer to write it yourself? Use our letter template
Every address we hold for Fiducial, with the envelope wording
Before you cancel Fiducial, 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 Fiducial 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.
A mailed letter is slower than a phone call but it is the version that proves what you asked for and when.
Fiducial cancellation at a glance
- How Fiducial accepts cancellations
- By mailed letter
- Mailing address on file
- Fiducial Rue du Capitaine Guynemer 41 92400 Courbevoie France
- Country
- France
- Letter language
- French (template fr)
- Added to the database
- June 4, 2026
- Data last checked
