Learn in the textbookTargeted Attacks and Phishing Scams
DefinitionOne-click fraud (ワンクリック詐欺) is a scam that shows a message such as "Registration complete" after a single click on a link in a web page or email, and one-sidedly demands a fee.
ExplanationBecause the user never checked what was being ordered or how much it cost, a click alone does not form a contract, and there is no need to pay. The screen may show an IP address or device details and threaten "We have identified you", but that alone does not reveal a name or home address. Contacting them in a panic only hands over your own phone number or email address.
AnalogyIt is like touching the sign outside a shop and having a clerk rush up saying "The contract is made, please pay". Touching it does not mean you bought anything.