1. You can clearly refuse the inconvenience and do not provide address or unit information. Only the contact phone number is required on the credit card application form.

2. It is legal for the bank to call you, but it should not be too frequent and should not affect the reasonable rest time. The problem now is that my brother has multiple overdue credit cards at the same time, so each bank contacts him 1 to 2 times a day, which is quite frequent.