I understand how someone could make a bogus log book, but how can a person buy C-cards without doing the courses? Is there a black market C-card forgerer out there somewhere?
Corrupt instructor
As an aside, my now favorite LDS, which is not the one I used for my PADI OW, turned me away from their pool when I forgot to bring my C-card
Absurd and unjustified. There's no "legal" obligation to have a C-card for diving in the ocean, still less for a dip in a swimming pool.