Cancel O2

⚖️ Your rights in the UK: there is no statutory online “cancellation button” like in Germany, but you are well protected: contracts signed online or at a distance normally come with a 14-day cooling-off period (Consumer Contracts Regulations 2013). To leave a mobile network while keeping your number, simply text PAC to 65075 (or STAC to give the number up) – under Ofcom’s switching rules your provider must send the code within minutes, and using it with a new provider ends your old contract. For broadband, the One Touch Switch process lets your new provider handle the cancellation for you. If you cancel by letter, send it by tracked or signed-for delivery so you have proof. Below you’ll find the official cancellation route for O2 – and we’ll prepare a ready-to-send cancellation letter with the correct address at the same time.

Want to cancel your mobile contract with O2? There are several ways to do it – pick whichever is easiest for you. Tamgara helps you put your cancellation in writing, with the correct address for Telefónica UK Limited. Free, no account needed.

📋 You have three ways to cancel O2

Open the O2 cancellation page

Official instructions for cancelling. The process itself usually requires you to sign in. Open the official cancellation page and follow the steps – you will usually need your online account.

Open Provider’s cancellation page →

Official 'Leaving O2' help page. The postal address is O2's official correspondence/complaints department taken from O2's own complaints page. Last reviewed: August 2026. No guarantee – providers change their links frequently.

Write your cancellation letter here & send it digitally

Fill in the cancellation letter with the correct address for Telefónica UK Limited, sign it in your browser or on your phone and send it as a signed PDF by email – no printer needed.

✍️ Create my O2 cancellation letter

Post the cancellation letter yourself

Fill in the cancellation here, sign it and download the PDF. Print it and send it – ideally by tracked or signed-for delivery – to the address below, so you have proof of postage.

📮 Cancellation address for O2

Telefónica UK Limited
Correspondence Department, PO Box 694
SO23 5AP Winchester

⚠️ No fax any more: O2 does not accept cancellations by fax — cancel by phone, via the switching service or by post instead. Source

💡 Cancel with 30 days' notice by calling 202 free from an O2 phone. Text PAC to 65075 to keep your number or STAC to 75075 to leave without it; the switch itself ends the contract. PO Box 694 is O2's published correspondence department in Winchester.

Address as published by the provider. Last reviewed: August 2026. All details provided without guarantee.

🫶 Community: how do others cancel O2?

These cancellation details are maintained and rated by the community. Was this helpful?

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📠 You can send your cancellation by fax directly through Tamgara.

✍️ Fill in my O2 cancellation letter →

Frequently asked questions

How do I cancel my contract with O2?

Enter your customer number and the date you want the contract to end in the cancellation letter, sign it digitally and send the PDF to Telefónica UK Limited, Correspondence Department, PO Box 694, SO23 5AP Winchester. With Tamgara the recipient details are already filled in.

What does a cancellation letter to O2 need to include?

Your details, the recipient, your customer or account number, the date, a clear statement that you are cancelling (with your preferred end date) and your signature. Also ask for written confirmation that the contract has ended.

Tamgara ✍️ · All cancellation templates · Cancellation letters by provider · Cancel your mobile contract (general template) · Provider missing? Suggest it · Legal & privacy
Free sample template – not a substitute for legal advice. Simple electronic signature (eIDAS). Trade marks and company names belong to their respective owners; Tamgara is not affiliated with O2.