1. Authentication: Require the other party to produce valid identification and work certificate to ensure their identity and the organization they represent.
2. Refuse to provide information: Never provide personal sensitive information by telephone, such as ID number, credit card number, bank account number, etc. Emphasize that you will not provide or confirm any personal information over the phone.
3. Bank verification: Contact your bank or credit card company, tell them about your situation and ask them if they have sent employees to handle credit cards at home. It's true, they can confirm and provide relevant information.
4. Call the police: If you suspect that you have encountered fraud, report it to the local law enforcement department immediately and report the situation to the relevant financial regulatory agencies. They will be able to provide guidance and help. Credit card is a payment tool, which allows cardholders to obtain credit provided by banks or financial institutions when purchasing goods and services, and then repay the arrears at a later date or within the installment period.