Cancel your Datak subscription by mail
Datak accepts written cancellation requests by post, which makes certified mail the strongest proof that you asked. Letters to Datak go to Le Vésinet, France.
Let Postbye cancel Datak 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 Datak.
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- 2 Datak cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Datak by mail
Gather your account details
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 Datak has on file.
Write the cancellation request
Postbye writes the letter in French from our French template, because Datak's address is in France. It opens with the subject line “Objet : Demande d'annulation – [your name]” and asks Datak to end the subscription, stop all further charges and confirm in writing.
Send the letter by certified mail
Take the letter to the post office and ask for certified delivery to 78110 Le Vésinet. Keep the tracking number it gives you.
Keep the delivery receipt
Keep the tracking record with your copy of the letter. If Datak bills you after the date it received the request, you have the dates to point to.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Datak cancellation letter goes
Datak can be reached by post at Boulevard des États Unis 82, 78110 Le Vésinet, France.
Copy the postal code 78110 exactly: it is what routes the letter to Île-de-France, France.
The letter is addressed “À qui de droit,” and its details block uses the labels Titulaire du compte, Adresse de facturation enregistrée and E-mail enregistré.
Prefer to write it yourself? Use our letter template
Before you cancel Datak, check these
- Write well before the next billing date. A request that arrives after it can leave one more charge on your statement.
- 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.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Datak 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.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
Datak cancellation at a glance
- How Datak accepts cancellations
- By mailed letter
- Mailing address on file
- Datak Boulevard des États Unis 82 78110 Le Vésinet France
- Country
- France
- Letter language
- French (template fr)
- Added to the database
- June 4, 2026
- Data last checked
