
A cancellation letter sent to the wrong address systematically delays the processing of the request, extending the subscription beyond the desired date. SFR requires the letter to be sent to a specific address, 69947 Lyon Cedex 20, without exception, under penalty of invalidating the procedure.
Some contracts include non-negotiable notice periods, often unknown, which apply even after the letter has been sent. Any error in wording or lack of supporting documents can also lead to a rejection of the procedure.
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Cancelling an SFR subscription: what you need to know before getting started
Before starting any process, you should look into the general terms and conditions of your internet offer or SFR mobile plan. Many subscriptions come with a commitment of 12 or 24 months. Cancelling before the end means you will have to pay fees: expect at least €59 for an SFR box, and for mobile plans, the amount depends on the number of months remaining to pay. The RED by SFR plans, on the other hand, do not require a commitment: no imposed duration, no fees if you leave.
The safest way? The registered letter with acknowledgment of receipt. It should be sent to the SFR cancellation address at 69947 Lyon Cedex 20. To avoid any blockage, take the time to specify your contract number, your complete contact details, and also attach a supporting document if you mention a legitimate reason: moving out of the SFR area, serious illness, dismissal, death… Otherwise, the request may be refused or unnecessarily delayed.
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The calculation of fees is based on the Chatel law and purchasing power: depending on your situation, cancelling SFR results in the loss of Multi-Packs benefits and requires the return of equipment (box, decoder, etc.). Upon receipt of the registered letter, the legal deadline is 10 days to terminate the subscription. You must then return the SFR equipment within 15 to 20 days; otherwise, financial penalties will apply, and the security deposit is only refunded after the complete return of the equipment.
If you have just subscribed to an offer, there is a right of withdrawal of 14 days: it allows you to cancel your SFR internet or mobile subscription for free. Make sure this period applies to you before sending your request to the official address.
To which address should you send your SFR cancellation letter and how to properly prepare your request?
Your SFR cancellation letter must be sent as a registered letter with acknowledgment of receipt to this address: TSA 10101 or TSA 30103, 69947 Lyon Cedex 20. This is the condition for your request to be processed quickly and followed up by the SFR customer service.
Prepare a clear, dated, and signed letter. You need to include your contract number, all your contact details, as well as the desired end date for your internet or mobile subscription. If you wish to keep your number, portability requires you to mention the RIO code (obtained by calling 3179). This code triggers the transfer of the number and the automatic cancellation of the old offer.
For certain reasons, add a supporting document: moving out of the area, long-term illness, dismissal, death of the account holder. A complete file speeds up processing, unlike an omission that blocks or delays everything.
To avoid any omissions, here’s what your file should contain:
- Registered letter with acknowledgment of receipt: the method that protects your interests.
- Precise contact details: contract number, address, phone.
- RIO code if you wish to keep your number.
- Supporting documents for any legitimate reason invoked.
A clear and complete letter avoids back-and-forth with customer service. From your SFR customer area, you can track the progress of the request or seek help if necessary.

Deadlines, fees, and consequences: everything that changes after sending your letter to 69947 Lyon Cedex 20
As soon as customer service receives your SFR cancellation letter at the Lyon Cedex 20 address, the countdown begins. SFR then has a legal deadline of 10 days to terminate your internet subscription or mobile plan. This period starts from the date of receipt of the registered letter. For recent subscriptions, the right of withdrawal allows you to retract your commitment without fees within 14 days after signing the contract.
Here are some key points to remember about costs and exceptions:
- Fixed fees: €59 to cancel an SFR box, no fees for offers without commitment.
- Variable fees: for a subscription with commitment, the calculation takes into account the Chatel Law and the Purchasing Power Law. The more months remain, the higher the bill, especially if the commitment is long (12 or 24 months).
- Legitimate reason: upon presentation of solid supporting documentation (moving out of the area, long-term illness, dismissal…), you may be exempt from fees.
Regarding equipment, the return of the SFR box and accessories must occur within 15 to 20 days after the end of the subscription. If everything is returned in good condition, the security deposit is refunded. If the equipment is missing or returned damaged, non-return penalties apply without delay. Finally, cancellation removes any potential SFR Multi-Packs benefits associated with your contract.
Cancelling with SFR is not just a simple letter: it is initiating a precise mechanism, where every step counts. At stake is regained freedom… or some unpleasant surprises for those who overlook the details.