Cancel your Invassist Plus subscription by mail
Cancelling Invassist Plus means putting it in writing; the company takes requests by mailed letter, and a tracked one leaves a clear record. Our database has Invassist Plus's mailing address in Fontenay-sous-Bois, France.
Let Postbye cancel Invassist Plus 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 Invassist Plus.
- 4.8 from 2,931 reviews
- 2 Invassist Plus cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Invassist Plus by mail
Collect the details you need
Have the name and email on the account and, if you have one, an account or customer number to hand. The details in the letter need to match what Invassist Plus has on file.
Prepare the letter
Postbye writes the letter in French from our French template, because Invassist Plus's address is in France. It opens with the subject line “Objet : Demande d'annulation – [your name]” and asks Invassist Plus to end the subscription, stop all further charges and confirm in writing.
Mail the letter with a receipt
Send it certified to Fontenay-sous-Bois, France, copying the address from the next section letter for letter, and keep the receipt slip.
Keep proof the letter arrived
It shows the date Invassist Plus received your letter. Check your next statement: no Invassist Plus charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Invassist Plus cancellation letter goes
Invassist Plus can be reached by post at Rue du Bois Galon 19, 94120 Fontenay-sous-Bois, France.
The postcode 94120 belongs to Île-de-France, France, so this is where the envelope is delivered.
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 Invassist Plus, with the envelope wording
Before you cancel Invassist Plus, 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 Invassist Plus 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.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
Invassist Plus cancellation at a glance
- How Invassist Plus accepts cancellations
- By mailed letter
- Mailing address on file
- Invassist Plus Rue du Bois Galon 19 94120 Fontenay-sous-Bois France
- Country
- France
- Letter language
- French (template fr)
- Added to the database
- June 4, 2026
- Data last checked
