That's why most contracts contain a clause that specifically accounts for this: https://en.wikipedia.org/wiki/Severability https://en.wikipedia.org/wiki/Severab

That's why most contracts contain a clause that specifically accounts for this: https://en.wikipedia.org/wiki/Severability https://en.wikipedia.org/wiki/Severability That said, under German consumer protection laws a ToS may also not contain anything that could be considered "surprising" (which is generally interpreted in favor of consumers) so most ToSes are fairly pointless as soon as they go beyond the basics.