Hi My question is simple - how does the immigration office check that the dates entered (when you left USA for trips) when filling out the N400 form for Naturalisation ? A. Do they take your word for it ? b. Do they cross ceck the dates with the stamps in your passport ? c. They have their own arrival and departure records from the Airports ? I have heard many times that they know the dates when u re-enter US from trips abroad, BUT they have no clue when you LEFT US for the trips. Do reply if you have any knowledge / experience about this. Monu.