I recently looked to register for an AC Milan card to get tickets to their derby game. (I didn't in the end I got general sale).
But a few things.
To get a card, you have to be verified, by giving your details, including a photo, a passport scan and a selfie with said things.
If you wanted to, you could then pass your ticket via their system, to another card holder.
I don't know about credits or implications.
Seems a sensible approach. (In Italy it's law to have name on ticket or card btw).
It's as above really what I said about Italian footy recently.
As long as you make it so that you can pass a ticket on to someone who is also registered, then the complaints should be minimal for this. Also when I attended the above game I had to show my ID (as did the other 80k). Was no issue.
I hope for that that share - can assign the card via a system.
We got in a group of 4. One hasn't gone that much in the last few seasons for various reasons. He will again soon. I'd hate for us to be split up because of life getting in the way. Selfish yes, but groups together are important as well.