Your behavior should be entrusted by people and charged.
3. If it is only once, simply submit the information and answer the verification call as a friend, and the card will be fine.
4. If it is handled and charged by multiple groups of people, it is an intermediary act and may be suspected of illegal business operation or crime.
5. Handling false qualification information alone or assisting others to collect fees is a crime, which may be suspected of credit card fraud (of course, the card owner's malicious consumption and non-performance of repayment constitute a malicious overdraft crime), may be a joint crime, or may be suspected of forging seals and other crimes.
In short, it is not illegal to introduce a friend to apply for a credit card only once, and it is not illegal to take fraud and other illegal acts in order to promote the success of the credit card application and collect huge profits.