When creating a free trial, can I put a hold on a card to verify an active balance? or Can we decline pre-paid debit cards, in order to reduce our free trial misuse?
Currently it's not possible for you to instruct any payment vendor to decline pre-paid cards, or put a hold on an account via the MemberMouse integration.
If you want to "put a hold" on a card, the best option would probably be to offer a paid $1 trial. This would really help to filter out people that are not serious about purchasing your product.
Otherwise, in the meantime, our automated overdue payment handling will ensure people's access is removed if they haven't paid. Here's more information on that: Automated Overdue Payment Handling