Welcome to allnurses.
I verify hundreds of licences yearly, part of my job as a home care manager. In most states with online license data bases, ANY license the person held will be viewable online. Licensure status: active, inactive, expired, probationary, disciplinary history exists, deceased etc. would be noted. Claiming to be a licensed nurse (when not) is a criminal offense in most states, punishable by huge fines up to and including imprisionment.
Allnurses love life advice:
If this woman is so insecure that she needs to lie about her career, what else is she lying about? You've felt the need to "check up " on her. Better find a new woman.