The Swiss authorities online
If the relationship between the employer and the employee is not regulated by a fixed-term contract, either party may terminate the contract at any time. However, when terminating a contract, a certain period of notice must be given.
If not otherwise specified in the employment contract, the contract can be terminated orally. For evidentiary purposes, however, you should send a notice letter by registered mail. If you deliver the letter personally, ask for an acknowledgement of receipt on a copy of the letter for confirmation.
Termination is only effective once the letter of termination has been received by the employer. The letter must reach your employer on the last workday of the month at the latest.
The written notice must:
You are not required to state why you are choosing to leave.
Make sure that the period of notice agreed in the employment contract was observed. If there is no written employment contract and no collective employment agreement, the period of notice is regulated by the Code of Obligations (CO). It comprises:
Employers must guarantee employees protection from termination for the duration of military, civilian or civil defence service, and in the event of illness, accident or pregnancy. Employees can still give notice during this time.