Join Date: Oct 2007
Location: Catania, Sicily(CTA)/South Jersey (PHL)/Houston(IAH)/Red Stick, La.(BTR)/airborne in-between
Programs: United Plat (1MM), AA ExecPlat, ITA/AZ Freccia, Hilton Diam, Bonvoy Gold, Hertz Prez, IHG gold
Posts: 3,859
Normally you should hand your declaration form over to the Customs agent as your are departing the baggage claim area (after immigration)
That form has your trip details (at least what you choose to write) and length on it.
Ciao,
FH