We came to Germany through the Blue Card program. I am changing jobs after three years on Blue Card. I have a gap of a little over one month between the jobs. We were considering going on a road trip during this one month gap. Currently we are living in a service apartment. The new job would be in a different city, so we do not intend to extend our lease. So my question is, do we have to maintain an address at all times? Can we rent a PO box for one month or maybe 3 weeks while we go on our road trip? Once we are back from our trip, we would definitely be moving into an apartment; temporary furnished one or a permanent one depending on what we find.
Also, do I need to do anything specific with respect to the Blue Card because of the break between jobs?