Cancel your O2 subscription by mail
O2 deals with cancellations through the post, so the request goes in a letter and the certified-mail receipt is your proof of when. The cancellation address on file for O2 is in Madrid, Spain.
Let Postbye cancel O2 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 O2.
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- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel O2 by mail
Get your account details together
Check the account number, the phone number or service address being cancelled and the name on the account before anything else. A request that does not match the account on file at O2 is the easiest one to set aside.
Set out the request
Because O2 is dealt with in Spanish, the letter is written in Spanish (template es). Subject: “Asunto: Solicitud de cancelación – [your name]”. It requests an end to the subscription and to every further charge, plus written confirmation.
Post it with proof of delivery
Address the envelope to O2, Madrid, exactly as printed in the next section. Certified mail gives you a tracking number and a delivery record.
File the delivery record
Once the letter is delivered, the date on the receipt is the date O2 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 O2 cancellation letter goes
For a letter to O2, use Ronda de la Comunicación 2, 28050 Madrid, Spain.
Postal code 28050 places the address in Madrid, Spain.
The database also lists 260 Bath Road, o2, SL1 4DX Slough, United Kingdom for O2. Use the first address above unless your agreement names this one.
Your details go in a block headed by Titular de la cuenta, Dirección de facturación registrada and Correo electrónico registrado, and the opening line is “A quien corresponda,”.
Prefer to write it yourself? Use our letter template
Before you cancel O2, check these
- Name the exact line or service address. Accounts with several lines can leave one of them running.
- Ask for a final bill in writing and return any rented equipment by tracked mail.
- Check for an early-termination fee or a remaining equipment balance before the cancellation date.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel O2 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.
Cancelling a phone or internet plan
Phone and internet providers tie cancellation to contracts, equipment balances and notice periods, so the request should name the exact line or service and ask for a final bill in writing.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
O2 cancellation at a glance
- How O2 accepts cancellations
- By mailed letter
- Mailing address on file
- O2 Ronda de la Comunicación 2 28050 Madrid Spain
- Second address on file
- O2 260 Bath Road o2 SL1 4DX Slough United Kingdom
- Country
- Spain
- Letter language
- Spanish (template es)
- Category (from the company name)
- Phone & internet
- Added to the database
- May 6, 2026
- Data last checked
