leonard1F,
It is a requirement that you contact a Customs/Immigration officer, in person, at the port of intended entry. Some airports only have one person, and he/she may be off doing something at another airport when you arrive. Or, maybe even having a day off.
As PIC you are required to know the rules. I also carry a copy of my eapis request with me. It does not state that I have been cleared, but it does show that I did my duty as PIC, and I have a copy if there is any argument.
When you call and speak with a real person, not answer machine, ask him/her for their badge number, and make a note of it. They will always give it to you if requested.
All part of the fun of international ops', and as has already been said using one of the many available service companies will save you a lot of money even if it costs a little to start with.
We have many good customs people, but just like in France we have our share of A***holes.
Speedbird 48