In order for the termination of the employment contract to be effective, it must be sent by post. Cancellations by email or in other text forms are not valid.
The signature must also meet certain requirements. This generally requires the signature with the last name. An initial is not valid as a signature. This is the conscious and intentional abbreviation of the name to a few characters, such as the initials. It is sufficient if someone who knows the name of the signatory and their other signatures can read the name from the writing. However, the signature does not have to be completely legible. It only serves to identify the exhibitor, which is why lettering that has individual and characteristic features that make imitation difficult is sufficient. The letter must therefore be signed by hand in the original. A printed, electronic version is not effective.