Cancel your Avanquest subscription by mail
Avanquest accepts written cancellation requests by post, which makes certified mail the strongest proof that you asked. Avanquest receives written requests in Courbevoie, France.
Let Postbye cancel Avanquest 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 Avanquest.
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- 3 Avanquest cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Avanquest by mail
Note your account details
Before writing, collect the account email, the plan or product name and the invoice or order number from your latest receipt. Avanquest can only act on a request it can match to an account.
Set out the request
The request is prepared in French (template fr), under the subject line “Objet : Demande d'annulation – [your name]”: end the subscription, stop all further charges and confirm in writing to you.
Post the letter
Use certified mail for the 92400 Courbevoie address in the next section, so the post office records the delivery. Write down the tracking number.
Hold on to the receipt
It shows the date Avanquest received your letter. Check your next statement: no Avanquest charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Avanquest cancellation letter goes
Avanquest can be reached by post at Rue Berthelot 2, 92400 Courbevoie, France.
Courbevoie is in Île-de-France, France; the postal code to quote is 92400.
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 Avanquest, with the envelope wording
Before you cancel Avanquest, check these
- Apps billed by an app store are cancelled in that store. Check which party appears on your statement.
- Team and business plans are billed per seat. Name the plan and the number of seats in the request.
- Export or download your data first. Access often ends on 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 Avanquest 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 software or app subscription
Software plans are billed per plan or per seat, often yearly, and the app store version is billed by the store rather than the developer, so the request has to name the plan and who bills it.
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.
Avanquest cancellation at a glance
- How Avanquest accepts cancellations
- By mailed letter
- Mailing address on file
- Avanquest Rue Berthelot 2 92400 Courbevoie France
- Country
- France
- Letter language
- French (template fr)
- Category (from the company name)
- Software & apps
- Added to the database
- May 19, 2026
- Data last checked
