I’m confused — how is this legally binding?
In Germany, a termination is valid IFF the termination has been submitted to the employee in writing in a timely manner — that is, they need to have been able to receive it before end of month or it’ll delay the notice period by a month. The standard notice period is 3 months. (I had to do this quite a few times recently unfortunately).
Are worker rights really this bad in the US?