Yes, you can have several subscriptions or several badges connected to the same bank account, as long as your subscription plan allows you to have several badges.

That is up to you:

You can order an extra badge on your Liber-t subscription, which will be charged to your bank account, as long as your subscription plan allows you to have several badges. Find out more about how to order an extra badge .

If you would like this new electronic toll payment badge to be charged to a difference bank account, the family member in question will have to take out a new contract in their own name with their bank details.