Originally Posted by
lynxy
The weekend card is checked automatically by the system when you book (you have to give the number for each passenger).
Indeed, this is the main difference between the weekend card and the Senior card : you cannot book a WE fare if you don't have a valid WE card for the trip date, while you can book a Senior fare without having the Senior card but you need to have it at the time of the trip and it can be controlled at the airport. Some years ago, the Senior card was handled as the WE card is handled today. I don't know why they changed this.