I make no guesses about the APS card.
However, I disagree regarding the public, including much of Tucson, not having some idea that NG is Savannah's mother.
Savannah has often talked about growing up in Tucson. Her mother has been on the Today show, and Savannah televised a hometown special in which she went back to her childhood home, talked about her family and early years, and interviewed her mom.
That does not mean that everybody or anybody in Tucson particularly cared about that until now. But for those who did, as Tucson is not a celebrity town as it is here (NYC) or in Los Angeles, NG may have been viewed by some as a quasi-celebrity.
They may not have known her elite area very well, but anybody can find an address and phone numbers on the internet.
JMO