Consolidator tickets are tickets normally issued through either "bucket shops" (listed in the travel sections of Sunday newspapers), or through selected travel agencies. I don't know what the fare code is on the ticket, but it's readily apparent that they are issued from consolidators. Also the few times that I've flown them, the price on the receipt was $0 plus taxes. I believe Priceline.com and Skyauction.com tickets are also considered consolidator purchases.

I'm not an expert on this--maybe someone can elaborate.