This is a very specific matching inside Air France named "Platinum for 2" If you are Platinum on Flying Blue AND you have Amex Airfrance platinum (France based) THEN you are entitled to name anyone you want "Platinum on Flying Blue" (your wife, your mistress, your mother,...) It's extremely interesting because a person that is sometimes Opale can then get full mileage/lounge access from Air France Here is the link in French only (sorry) https://www.airfrance.fr/FR/fr/common/faq/flying-blue-mon-espace/qu-est-ce-que-platinum-for-2.htm