When you move to France, you learn pretty quickly what a justicatif de domicile is. You need copies of those pesky quittances de loyer and EDF bills to do everything from getting a library card to getting married. The French seem to love asking for an unseemly pile of photocopies--what they call a "dossier." With a RIB par ici and a bulletin de salaire par là, they're simply in paperwork heaven and will let you do just about anything. Just don't try pulling anything creative (like changing jobs), or you'll find yourself blacklisted from the whole system. And if there's anything the French like better than asking for a five-year paper trail, it's a chance to say, "Non."
Humphrey Bogart and Claude Rains as Rick and Captain Renault. [Online image] 1942.