When I am flying out of or into the FRZ Directly I do call and get a
code before leaving the ground.
I was 40 minutes from my entry point and the approach control does not
have the flight plan until about 20 minutes before. I believed calling
FSS and verifying the existence would be ok since once they have been
filed and verified I have had only a couple of flight plans lost.
Michelle

john smith wrote:

I am guessing that the best solution is to request the ATC facility
Watch Desk telephone number from the briefer you file your flight plan
with and then call the watch desk from the ramp prior to engine start
and verify with the ATC facility that they do indeed have your flight
plan.