You are TOO EAGER to report!!! We bought an old house in Burgundy. My 3 twenty-something nephews came from Poland for short period (2 weeks) to help us demolish a huge steel shed that we didn't want to keep. (and yes, we do have the permit to demolish). And, ahem, I was born in Poland so this is where a lot of my family still lives. My husband (who speaks English only) was working with them today when the Gendarmes showed up! ('') They tried to question the boys who only speak Polish and some English, so no conversation there, and then turned to my husband who by gestures etc explained to them that he is the owner. Easy enough to check this one - he gave them his name and age but they did not ask to see his passport. The Gendarmes left, but now we are all uneasy! My guess is that an overeager neighbour called them in - thinking my husband and my nephews were all illegal workers! We paid bus fares for the boys, they are staying in our house, we feed them and after work we take them to see the tourist sights. We will of course give them some gifts on departure, and perhaps some pocket money... but they mostly have fun being in France and learning to use power tools! Does that make them undocumented workers? I am worried that Gendarmes continue to pester us and perhaps all the other offices which you so hotly recommend to denounce others to! We are not doing jobs for other people, but you can say that we took anyway French jobs (or yours) by doing the demolition ourselves rather than hiring people. According to your line of thought, we should be declaring and paying taxes on our own work performed in our own property since technically we deprived some chap of 22 euro per hour wage ?