A parent gives his irresponsible child a credit card. That child maxes out the card by paying only the first month’s installment of an incredibly expensive annual subscription.
The parent confiscates the credit card to prevent new irresponsible spending. He must still, however, pay the existing credit-card debt. He must also honor the remainder of the contract his child has signed, even if doing so means he must incur more credit-card debt and ask for an increase in his credit-card limit. Unless he is willing to risk bankruptcy or a lawsuit, he must honor the financial obligations his family member incurred.