So from that it sounds to me like you could just use your friends address while you remain the domain holder. I've seen a few Germans doing this for a while now.
BUT with .fr's be cautious of what you purchase. Trademark law is no joke in France, it's very antiquated, and seems to be a bit of an "old boys" club. We've been sued a couple times now and it's cost us tens of thousands of euros to settle, but the market is good, the names have traffic, and if you play clean, avoid typos, and check www.icimarques.com, you could do pretty well.