Yes it is all true! We have paid money to URSSAF but was then sent a refund some time later. When we questioned this we were told not to worry and that we would receive another charge at a later date, which we are still waiting for. This may appear 'naive' on our part, but believe you me we have visisted the CPAM office which is a 70 mile round trip, sent letters and have made numerous phone calls! We have made a real effort.