<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by robbert:
I've tried unsuccessfully to cancel my OnePass account for several months. No activity for many years (more than 3) but they keep my account with 0 miles active! I'm just worried that it may accidentally record a flight that I wanted to earn WorldPerks miles on.</font>
If you don't give your OP number to NW when you book, or to the agent at the check-in counter, or gate, how on earth is your flight going to get credited to CO?
Don't worry about it at all.