Ask HN: Why on Earth does Europe have 3 month notice periods to switch jobs? 3 years ago
This is simply not true. At least in IT it's 3 months as soon as you're done with the probation period (which is usually 6 months). Not sure about the employer, but employees can cut this period shorter. The document is called Aufhebungsvertrag – termination agreement. I just think the employer has to agree to this.