Cancel your IQ Booster subscription by mail
Cancelling IQ Booster means putting it in writing; the company takes requests by mailed letter, and a tracked one leaves a clear record. IQ Booster receives written requests in Konak, Turkey.
Let Postbye cancel IQ Booster 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 IQ Booster.
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- 3 IQ Booster cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel IQ Booster by mail
Find your account details
Check the name and email on the account and, if you have one, an account or customer number before anything else. A request that does not match the account on file at IQ Booster is the easiest one to set aside.
Set out the request
Postbye drafts the request in Turkish, the language of Turkey, with “Konu: İptal Talebi – [your name]” as the subject line. It asks IQ Booster to close the subscription, stop billing and confirm in writing.
Post the letter
Send it certified to Konak, Turkey, copying the address from the next section letter for letter, and keep the receipt slip.
Hold on to the receipt
Once the letter is delivered, the date on the receipt is the date IQ Booster was told. Compare it with your statements over the next billing cycle.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your IQ Booster cancellation letter goes
IQ Booster lists Cinarli Mah. Ankara Asfalti Cad. No:15, Kat:41 D:411, 35170 Konak, Turkey as its mailing address.
Copy the postal code 35170 exactly: it is what routes the letter to İzmir, Turkey.
The letter is addressed “İlgili Makama,” and its details block uses the labels Hesap sahibi, Sistemdeki fatura adresi and Kayıtlı e-posta.
Prefer to write it yourself? Use our letter template
Every address we hold for IQ Booster, with the envelope wording
Before you cancel IQ Booster, 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 IQ Booster 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.
IQ Booster cancellation at a glance
- How IQ Booster accepts cancellations
- By mailed letter
- Mailing address on file
- IQ Booster Cinarli Mah. Ankara Asfalti Cad. No:15 Kat:41 D:411 35170 Konak Turkey
- Country
- Turkey
- Letter language
- Turkish (template tr)
- Added to the database
- October 13, 2026
- Data last checked
