Nuisance call countermeasure apparatus, method and program

A spam call prevention method performed by a spam call prevention apparatus, the spam call prevention method comprising:

• by the spam call prevention apparatus, conveying, to a phone terminal of a sender of a call, a response that, in a case where the call from the sender is evaluated as a spam or a fraud by a receiver of the call, the sender is billed a sum of money corresponding to a probability of being evaluated as the spam or the fraud;
• by the spam call prevention apparatus, notifying, when the sender has requested, in responding to the response, the call to the receiver, a phone terminal of the receiver of a request for returning an evaluation result of evaluating the call from the sender after the call between the sender and the receiver has ended;
• and
• by the spam call prevention apparatus, determining, when the call from the sender has been evaluated as the spam or the fraud in the evaluation result, the sum of money corresponding to the probability of being evaluated as the spam or the fraud, as a sum of billing.

A non-transitory computer readable medium storing one or more instructions causing a computer to execute:

• by a spam call prevention apparatus, conveying, to a phone terminal of a sender of a call, a response that, in a case where the call from the sender is evaluated as a spam or a fraud by a receiver of the call, the sender is billed a sum of money corresponding to a probability of being evaluated as the spam or the fraud;
• by the spam call prevention apparatus, notifying, when the sender has requested, in responding to the response, the call to the receiver, a phone terminal of the receiver of a request for returning an evaluation result of evaluating the call from the sender after the call between the sender and the receiver has ended;
• and
• by the spam call prevention apparatus, determining, when the call from the sender has been evaluated as the spam or the fraud in the evaluation result, the sum of money corresponding to the probability of being evaluated as the spam or the fraud, as a sum of billing.