[AnchorAlumna]

Yet another good reason to use the sponsorship system. Your sorority's alumnae from the candidate's hometown checks her out and writes the sponsor (AKA recommendation) form or letter. More than likely she will turn up whether the girl has been an initiated member of another NPC group. Not to say that some will slip through the cracks, but it would be another check. I personally would not give Panhellenic my social security number.
I really don't think it is that big of a problem. Now, I'm not saying that NO woman has EVER been initiated in 2 NPC orgs. People forget the rules. Perhaps the transferee really misses her sorority experience and wants to continue it. But I don't think it is that frequent a problem.