Cancel your Monthly Flex subscription by mail
Cancelling Monthly Flex means putting it in writing; the company takes requests by mailed letter, and a tracked one leaves a clear record. The cancellation address on file for Monthly Flex is in London, United Kingdom.
Let Postbye cancel Monthly Flex 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 Monthly Flex.
- 4.8 from 2,931 reviews
- 3 Monthly Flex cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Monthly Flex by mail
Find your account details
Put the name and email on the account and, if you have one, an account or customer number in front of you before you write: the request to Monthly Flex is only as good as the details it quotes.
Put the request in writing
Postbye turns the request into a finished English letter headed “Subject: Cancellation Request – [your name]”: close the Monthly Flex account, stop every charge and reply in writing.
Send it by certified mail
Take the letter to the post office and ask for certified delivery to W6 7AP London. Keep the tracking number it gives you.
File the delivery record
Keep the tracking record with your copy of the letter. If Monthly Flex 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 Monthly Flex cancellation letter goes
The mailing address we hold for Monthly Flex is 12 Hammersmith Grove, W6 7AP London, United Kingdom.
The postcode W6 7AP belongs to England, United Kingdom, so this is where the envelope is delivered.
The letter is addressed “To Whom It May Concern,” and its details block uses the labels Account holder, Billing address on file and Email on file.
Prefer to write it yourself? Use our letter template
Every address we hold for Monthly Flex, with the envelope wording
Before you cancel Monthly Flex, check these
- Look for annual or multi-month plans. A plan paid in advance usually runs to the end of the period you paid for.
- 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.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Monthly Flex 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.
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.
Monthly Flex cancellation at a glance
- How Monthly Flex accepts cancellations
- By mailed letter
- Mailing address on file
- Monthly Flex 12 Hammersmith Grove W6 7AP London United Kingdom
- Country
- United Kingdom
- Letter language
- English (template en-generic)
- Added to the database
- May 26, 2026
- Data last checked
