Join Date: Feb 2009
Location: Los Angeles, CA
Programs: UA Premier Gold, Starwood Gold, Plat AE, CO PP MC, Marriott Rewards Plat, Virgin Elevate Gold
Posts: 1,756
I wondered the same thing, so I called and asked them after a couple of weeks.
You dont have to initiate anything on your part. Everything is handled automatically. They will even determine your OnePass number from name and address if you dont provide it to them.