Cancel your Tranquility Labs subscription by mail
Tranquility Labs takes cancellation requests by mailed letter, so a dated certified-mail letter is the record that counts. Our database has Tranquility Labs's mailing address in Medford, United States.
Let Postbye cancel Tranquility Labs 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.
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Postbye is not affiliated with Tranquility Labs.
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- 2 Tranquility Labs cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Tranquility Labs 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 Tranquility Labs has on file.
Put the request in writing
State plainly that you want the Tranquility Labs account cancelled, further charges stopped and a written confirmation sent to you. Postbye sets this out in a ready English template (“Subject: Subscription termination – Tranquility Labs”).
Mail it with tracking
Take the letter to the post office and ask for certified delivery to 02155 Medford. Keep the tracking number it gives you.
File the delivery record
File the receipt with the letter. A Tranquility Labs charge dated after delivery is the one to dispute, and these two documents are what you quote.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Tranquility Labs cancellation letter goes
For a letter to Tranquility Labs, use 1 Shipyard Way, Suite 206, Medford, MA 02155.
ZIP code 02155 is in Massachusetts, so the letter stays inside the United States postal system.
Your name, address and email appear in a short block labelled Name, Address and E-mail, under the greeting “To Whom It May Concern,”.
Prefer to write it yourself? Use our letter template
Every address we hold for Tranquility Labs, with the envelope wording
Before you cancel Tranquility Labs, 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 Tranquility Labs 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.
Tranquility Labs cancellation at a glance
- How Tranquility Labs accepts cancellations
- By mailed letter
- Mailing address on file
- Tranquility Labs 1 Shipyard Way Suite 206 Medford, MA 02155
- Country
- United States
- Letter language
- English (template en)
- Added to the database
- April 30, 2026
- Data last checked
