Recorded, not charged. Read that twice
Some systems say they "automatically charge no-shows". That means they keep your patients' card details on file and take money from them without anyone at your clinic being involved.
Velvet Lead deliberately does not keep patients' card details. So the fee is recorded against the visit, a deposit already paid can be kept against it, and anything more is settled at your clinic however you already take payment. That is the honest version, and in our experience it is also the reassuring one: no patient has ever been pleased to discover a clinic can charge their card at will.