Originally Posted by sdm1130

As you mentioned, CO started requiring this for Visa purchases as well. I've had so many problems (reported to CO with no response) with CO.com completing the purchase after I provide my (correct) Visa password.

It's quite a pain and I wouldn't be surprised if CO is losing some business over this (passengers that may only have a Visa). Fortunately, I also have an AMEX, so I usually end up having to use that for CO.com purchases.