I whent to Beuvais yesterday, on arrival we were accosted by the French Customs

Our flight plan hadnt been recieved by them and so the ensuing mess.....well you can imagine

After an hour of questions and telephone calls it was resolved in our favour. So i was thinking, do any of you have a fool proof method of confirming your flight plan has been logged? Is there a way to check on the net before you leave?
Any thoughts chaps?
Cheers S10L.