I'm a Swiss citizen who has recently moved to Germany for short term employment (<5 years). I do not speak German. Since I will work here for less than 5 years, I can request to be exhempted from the "Pflichtversicherung in der Zusatzversorgung", which I believe is what in Switzerland is called AHV/AVS.
If I do not request this, what happens to the contributions I paid when I leave Germany? Can I have them transferred to my AHV/AVS contributions?
If I do request it and end up staying in Germany for more than 5 years (very unlikely but you never know), will I have to pay retroactively?