My parents let me fill my tank with gas. They wouldn't let me open an AWS account. Aside from that, if it is misuse of a parents card, then then answer is "chargeback."
Chargeback sounds like trying to defraud AWS. If the parent authorises the child to use their card, then the buck should stop with the parent. AWS has done nothing wrong in allowing an account to be opened with a valid card.
Some banks make chargebacks so easy that people just click the chargeback button without trying to reach out to the vendor. I see this a lot - I work for a “vendor”.
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