if you booked a 100% milage fare that required a purchase on co.com, you will, but i'd suggest printing your original receipt and itin.

sometimes, when standing by, when the agent changes your record by seating you on the new flight, it somehow changes the record and the system does not recognize that you booked online and thus, does not award you 100% miles.

it has happened to me a few times. a call to the onepass service center, fixes it, but its always good to have your orignal docs just in case.

if you booked a fare class that gets 100% mileage regarless of how you booked it, it should be fine, but id still keep all receipts, itins and borading docs until the mileage posts correctly.