hi, I'm student with F1 visa. I got a big problem on my way home. I found my I94 card lost when I checked-in to leave US. So I didn't turned in the card to the airline. I'm already in my contry now. I'm afraid of I have no departure record and will meet problems when I go back in two months. I'm wondering what I can to make it up. An agent told me to keep the boarding card to prove my departure. Does this way work? I'm very worried about it now. Does anyone have the similar exprience? thanks alot for your help.