Required. According to iAsk Knowledge, although you need to provide your card number and ID number when you use a credit card to return money, the password is usually not accessible to others. Make the login password and payment password more complex and keep them confidential, and keep your personality The signature is personalized and will generally not cause property losses to the cardholder; payment on the Internet is indeed unpredictable, but as long as various precautions are taken, the risk will be minimized.