I'm a bit baffled by this:
but its owner can extend the benefit to another accompanying adult.
However, it can only be used on Saturday or Sunday, or for a round trip including the weekend.
Could the person who wrote this show a citation from the SNCF website? My husband and I have been using separate SNCF senior cards for years and could have perhaps saved the 49 euros for one of us.
This could be what s.he is referring to: "Un accompagnant adulte ayant bénéficié d'une réduction associée au tarif de la carte Avantage devra obligatoirement voyager avec le titulaire de la carte Avantage correspondante. Le billet de l'accompagnant adulte doit être acheté simultanément au billet du titulaire de la carte Avantage Adulte."
But an accompagnant (companion) is for a person who is not capable of traveling alone, ie medically certified in need of a helper. It
If there is another provision where only one card is needed for two people, please show us. Merci.