Today I got mail from Verizon wireless saying that changes had been applied successfully to a certain phone number. After notifying Verizon via their website about the wrong email address, I called the number listed in the e-mail. She didn't know how to change email preferences in facebook, so I looked it up for her.
I forwarded all of the mail I've received so far to her Verizon address, and hopefully she'll be able to update such that Verizon itself will send the notifications to her new address. Hopefully also I'll stop getting her email, which will be nice when I'm waiting for something to arrive at that address -- I won't get so many false positives.