I have a Blue Card valid for 4 years, starting 2017, ending 2020. No employer is written on card or Zusatzblatt.
After 15 months of working for my first employer, I'm changing employment. If I change from my first employer, should I notify ABH? When should I do it: when I decide to quit, when I actually quit, after getting another job offer, or actually receiving a contract with a new employer?
How much time am I allowed to spend in Germany without a working contract? I've found it's three months.
Is this time cumulative? Does each successive job change allow me three months or, if I change jobs multiple times during those 4 years, does my unemployed time accumulate to 3 months in total?
I'm working in IT.