Originally Posted by
Hyperacusis
Out of curiosity, is there a departure record of some sort that you need to hand over when departing the US when using this method? (The kind that you usually do when entering on a physical I-94)
I'm guessing that you will get the I-94(W) stub inserted in your passport at immigration, even though you didn't have to fill it in yourself. One reason is that the date written on it is the official last day you are allowed to stay (sometimes my passport is not even stamped, or no date is entered with the stamp).