Cancel internet in Switzerland 2026: when a letter fails

Does a letter count? With 2 of 7 providers it doesn't

According to the ConvivaPlus analysis of the contract documents, with Sunrise and Galaxus Internet the terms expressly rule out a letter. Sunrise only accepts cancellations of internet, landline and TV by phone (0800 100 600) or chat; Galaxus Internet only in the customer account. A registered letter to either of them is not valid under the contract, and the notice period keeps running as if you had sent nothing.

With the other 5 a letter counts: Swisscom, Wingo, M-Budget Internet, Salt and Green. Wingo and M-Budget run on the terms of Swisscom (Schweiz) AG. Pick your provider in the ConvivaPlus Internet Cancellation Check: it shows the channel the contract requires, with wording, version and check date, and calculates the earliest end of your contract.

Cancel Sunrise: phone or chat only, and a ruling is pending

Since 2019, Sunrise has only accepted cancellations by phone or chat. In April 2026 the Zurich District Court declared this clause unlawful, in a case brought by the Swiss consumer protection foundation (Stiftung für Konsumentenschutz). The ruling is not final: Sunrise is appealing to the Zurich High Court (Obergericht).

For you, today, this means the contract still applies. According to Swiss broadcaster SRF, Sunrise will not change its practice until there is a final and enforceable ruling. If you cancel now, call or use the chat, and keep a record of the conversation with the call log further down.

The same ruling covers a second clause: in its terms (July 2023 version, clause 2) Sunrise excludes the right to cancel when prices rise with inflation. The court declared this clause unlawful too, again not yet final.

Keep your number: when a letter does count at Sunrise

The exception is in the contract: clause 16.4 of the special terms (version September 2025) still accepts a written cancellation if you take your number to a new provider and the new provider submits the cancellation electronically on your behalf as part of the number transfer.

So in this case you do not cancel yourself: you ask your new provider to port the number, and they pass on the cancellation. A registered letter you send yourself is still not valid, even when switching. If you are not keeping a number, only phone and chat count.

Help page or T&Cs? With 3 of 7 providers they differ

At Swisscom and Sunrise the notice periods are as if swapped: the Swisscom help page says 60 days, as in the Sunrise contract; the Sunrise help page says 2 months, as in the Swisscom contract. With Swisscom, Sunrise and Salt the help page differs from the contract, and the contract prevails.

The Swiss Code of Obligations (OR) does not treat the internet contract as a contract type of its own and prescribes no form for cancelling it; channel and notice period are therefore set by the contract. Salt differs on the channel: the help page names only the phone, the terms say "in writing or by phone" (schriftlich oder telefonisch). The table puts all three differences side by side, each with both wordings, version and check date.

To be safe, follow both: with Salt, write and also call; for the notice period, take the longer of the two.

Internet notice period: 2 months is not 60 days

For a contract ending on 31 March 2027, 31 January 2027 is still in time at Swisscom. At Sunrise and Salt it is already one day too late: the plan then runs until 30 April 2027, a whole month longer. One day at arrival can cost a month of base fees.

If your cancellation arrives on 31 December 2026, the Swisscom plan ends on 28 February 2027. Sunrise and Salt run until 31 March 2027, one month longer. "2 months to the end of a month" means the end of the second month after arrival. "60 days to the end of a month" means the first month-end at least 60 days after arrival. From 31 December, 60 days take you to 1 March, so to the end of March.

What counts is the day the cancellation reaches the provider, not the postmark. To leave Swisscom on 31 March 2027, your cancellation must arrive by 31 January 2027. With Green it is 2 months to the end of the billing period; how long that is, is on your bill. With Galaxus Internet, the notice period shown on abos.galaxus.ch when you signed up applies.

Minimum contract term: what cancelling early costs

Cancel Sunrise in month eleven of 12 and you do not pay the remaining base fees month by month but all at once: the special terms (clause 16.2) require the base fees for each service cancelled early up to the end of the minimum term, due immediately.

Swisscom, Wingo and M-Budget set no fixed minimum term in their terms at all, one "may" be agreed: whether you have one is in your individual contract, and you can cancel without costs at the earliest to its end. Salt charges "the fees provided for in the contract", with no formula in the terms. And at Green the plan does not end by itself after the minimum term: it renews tacitly by two months at a time.

If your minimum term is still running, enter its end in the check above: it then calculates the first end possible without costs.

Cancelling when you move, emigrate or in case of death

Only two of seven contracts name a move as a reason to cancel without notice, and only if the service no longer works at your new home: Sunrise and Galaxus Internet. With Green the terms expressly say the opposite: the minimum term keeps running, even if you move abroad.

Cancellation template: letter for 5 providers, log for the phone

Swisscom, Wingo and M-Budget Internet: three brands, but one and the same company in the contract, Swisscom (Schweiz) AG. The letter is addressed to that company, not to the brand. That is why every template here carries the name from the contract, not the one from the advertising.

There is a letter only where it counts: for Swisscom, Wingo, M-Budget Internet, Salt and Green, each with the contracting company, the notice period and the clause of the terms, as Word and PDF in four languages. For Sunrise and Galaxus Internet deliberately none.

Send the letter by registered mail, give your customer number and the connection address, and take the cancellation address from your last bill: addresses change, which is why we have not filled one in. Ask in the letter for written confirmation stating the date the contract ends. If you cancel for parents or a partner, enclose a power of attorney. For flat, job and insurance, the templates are under Cancellation letters in Switzerland.

[First name Last name]
[Street, postcode, town]

Registered mail

Swisscom (Schweiz) AG
[address as on your bill]

[place, date]

Cancellation of internet subscription Swisscom, customer number [customer number]

Dear Sir or Madam

I hereby cancel my internet subscription for the connection at [street, postcode, town of the connection] with effect from [date, e.g. from the Internet Cancellation Check], or at the latest from the next possible date (notice period: 2 months to the end of a month). The cancellation covers all services linked to this connection, except the one I name here: [e.g. keep the landline number / none].

Basis: Allgemeine Geschäftsbedingungen für Dienstleistungen von Swisscom (German version), Ziff. 12 Dauer und Kündigung, version August 2025.

Please confirm the cancellation in writing, stating the date on which the contract ends, and let me know whether and where I need to return equipment (router, TV box).

Reason for cancelling (optional, may be deleted): [reason]

Kind regards

[First name Last name]

Signature: ____________________

Call log: cancelling an internet subscription

Name: [First name Last name] · Customer number: [customer number] · Provider: [provider]

Have ready before the call
Customer number, connection address, requested end of contract, this sheet and a pen.

What · Entry
Date and time of the call / chat · ______________________
Number dialled or chat channel · ______________________
Name (or initials) of the customer service agent · ______________________
Said: “I am cancelling my internet subscription with effect from …” · ______________________
Confirmed end of contract (date, as stated) · ______________________
Reference, ticket or case number · ______________________
Confirmation by e-mail or text promised? To which address? · ______________________
Services cancelled (internet, TV, landline) / what stays · ______________________
Equipment return: what, where, by when · ______________________
Chat: transcript saved as screenshot or PDF? · ______________________

If no confirmation arrives
Call again within 5 working days, quote the reference number, and keep this log until the end of contract appears on the final bill.

Init7, yallo, iWay and cable networks: the contract text is missing

Three well-known names, and for none of them was a contract text publicly available on 3 November 2026: Init7, yallo and iWay. If you are their customer, ask the hotline which channel counts before you cancel, and get it confirmed in writing. A provider only gets a row in the table once we have read its contract; as soon as a contract becomes available, it gets its row.

Regional cable networks each have their own terms, including Quickline's partner networks. If you are on a cable network, the channel is in your network's terms; if in doubt, ask the hotline. Digital Republic does not offer home internet.