In Sweden, sending a fax or physical letter to a government instance or private companies rather than an e-mail is more or less unheard of, unless they for some reason need a physical paper with your signature on it (I've heard this happen with customs, for example), but in almost all areas of society this has now also been replaced with Bank-ID, which is digital.[1]
It's not just Germany.
I think Sweden is the exception here really though (and the other Scandinavian countries, and possibly the UK).
Unfortunately I don't think that's true. I'm looking at you, beer52.com! [1]
(And yes, they were doing this long before the UK left the EU, and are still at it today)
Eventually I sent an email to some random customer support email I found complaining and they actually did it.
This is unfortunate because although I can read German, I can’t write or speak it, so figuring out how to write that e-mail would be a headache.
Edit: Thanks to aboalarm.de, which I learned about from this thread, I have learned the correct formula to use:
> Sehr geehrte Damen und Herren,
>
> hiermit kündige ich mein oben genanntes Abonnement Ihrer Zeitschrift fristgerecht zum nächstmöglichen Zeitpunkt.
so if I do ever decide to cancel, this thread has been quite useful.
https://www.verbraucherzentrale.de/wissen/vertraege-reklamat...
It's based on an EU directive, but a recent one so not all countries have it live yet. More details on the EU directive and the German implementation starting next year: https://www.mofo.com/resources/insights/211006-new-two-click...
Your comment below says that there is no receipt for confirmation. O2 provides a default PDF form on their website which to fill for termination. The letter explicitly states that "o2 should send you a written confirmation of cancellation". It is illegal for O2 to be in receipt of a letter and not send a confirmation. I am sorry if that happened to you!
Don't get me wrong - the auto-renewal of contract practices in Germany are predatory for the consumers. Recently, there has been a change in law that forces providers to extend contracts by 1 month instead of 1 or 2 years.
[0] https://www.o2online.de/service/kuendigung/
[1] https://en.avm.de/service/knowledge-base/dok/FRITZ-Box-7490/...
[2] https://www.deutschepost.de/de/e/epost.html
[3] https://static2.o9.de/resource/blob/498264/12cd6ca6ee17a02b9...
Hopefully it'll get better. I also had a terrible experience with Vodafone in the UK, charging the higher rates for data usage with no warning.
Although I was surprised how relatively big faxes are in Germany. I never had sent a fax before I was in Germany.
They ended up chasing me for 3 years over 20 euros when I moved to the UK. At least here in Sweden, credit checks aren't really a thing thankfully.
One specific example is if your contract has a termination period, which is pretty common, at least in my part of Europe. If you simply stop paying, you are denying the other party N months of revenue (your cancellation period) that you are contractually obliged to pay. You are now defaulting on your payments and will likely pay additional fees.
But if the contract has no minimum term (or it has since passed) and you've made a reasonable effort to attempt to cancel with no success, it'll now be on them to recover the money through legal means which would require them to explain to the court why your cancellation attempt was ignored, demonstrating their bad faith in the process. That's not something they want to do.
In the end I paid it though, it was only 20 euros!