as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
how can a company charge a closed credit card?
user
if this is a pre-authorized automatic billing, and if you have signed any contract with the  merchant, cancelling may not block any future charges from the merchant.  happens with gyms, magazines, memberships quite often. there is a time period after the cancellation this will occur, then it'll be completely dead.
assistant