> For the complete documentation index, see [llms.txt](https://hoyapay.gitbook.io/chang-jian-wen-ti-fan-ti-zhong-wen/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hoyapay.gitbook.io/chang-jian-wen-ti-fan-ti-zhong-wen/ka-pian-chang-jian-wen-ti/cvv-shi-shen-mo.md).

# CVV是什麼？

CVV是信用卡或金融卡背面的3位數字，用於驗證您的身分並保障支付安全。請勿將卡號、有效期限、CVV等敏感資訊外洩給他人，以防帳戶被盜用。