Cancel your Mmsr subscription by mail
Mmsr deals with cancellations through the post, so the request goes in a letter and the certified-mail receipt is your proof of when. Post for Mmsr is handled in Alcobendas, Spain, which is where your letter is headed.
Let Postbye cancel Mmsr 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 Mmsr.
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- 3 Mmsr cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Mmsr by mail
Note your account details
Before writing, collect the name and email on the account and, if you have one, an account or customer number. Mmsr can only act on a request it can match to an account.
Set out the request
Postbye drafts the request in Spanish, the language of Spain, with “Asunto: Solicitud de cancelación – [your name]” as the subject line. It asks Mmsr to close the subscription, stop billing and confirm in writing.
Send it by certified mail
Take the letter to the post office and ask for certified delivery to 28108 Alcobendas. Keep the tracking number it gives you.
Save the tracking record
The receipt dates your request. Look at your next statement for any Mmsr charge after that date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Mmsr cancellation letter goes
Mmsr takes its post at Avenida de Europa 1, 28108 Alcobendas, Spain, which is where a cancellation letter belongs.
The envelope is going to Alcobendas in Madrid, Spain, so the postcode 28108 must be on the front.
The letter greets the reader with “A quien corresponda,”; your own details sit under the labels Titular de la cuenta, Dirección de facturación registrada and Correo electrónico registrado.
Prefer to write it yourself? Use our letter template
Before you cancel Mmsr, 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 Mmsr 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.
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.
Mmsr cancellation at a glance
- How Mmsr accepts cancellations
- By mailed letter
- Mailing address on file
- Mmsr Avenida de Europa 1 28108 Alcobendas Spain
- Country
- Spain
- Letter language
- Spanish (template es)
- Added to the database
- May 6, 2026
- Data last checked
