120x120 tile / piece broken

So you can also try it through legal action if you want. But it will probably be dismissed due to being a trivial matter, I would assume.

There is nothing like that in Germany. You can also sue for 10 cents, send a bailiff, seize business accounts, and whatever other tricks you can think of.

Something comparable exists only in criminal law and is called the private prosecution route.

Depending on the temperament. Of course, is right. Just enforcing something is often not that easy. Who says that the tiler didn't drop something? The tiler has to prove that it wasn't him. That should be difficult for him since no acceptance has taken place yet.

In post #2, a suggestion for defect repair is already made.