Change of home address between Phase One and Two

I just acquired the last document I need to send to Luxembourg for Phase One. I'm wondering, however, how a change of home address (in the near future) might affect the rest of the process. I'm planning to move to a different town this summer. My wife and I plan to start looking for the new home within the next month. The post office will forward mail for only a limited period of time (one year I think?), so this has me worried. Will this complicate matters greatly? Can I switch home addresses in between Phase One and Phase Two? Or should I simply rent a post office box (in the town I'm moving to) that I can use for the entire process? Thanks in advance for any advice.