Originally Posted by
zoned_post_meridiem
But what is their customs responsibility on a domestic flight, particularly in regard to something like financial instruments? To my knowledge, if I'm foolish enough to carry 20k in large bills in my pocket, I'm perfectly within my right to do so, unless I cross a border.
You can carry around as much cash as you want, however, government seems to believe doing so is evidence of a crime ,and civil forfeiture claims are not unheard of. Once they have your money getting it back can be a long and costly process if you ever succeed in getting it back at all.. If entering or leaving the country all you need do is claim amounts greater than $10,000 cash or cash instruments.