If an employer fails to comply with either of these conditions (i.e., the notice period or the termination date) when issuing a termination, the termination is considered untimely or unlawful.
This also applies if the employer observes a longer notice period than required by law, collective agreement, or individual contract but fails to comply with the required termination date.
OLG Vienna, 20.07.2023, 10 Ra 58/23 g