I don't know which bank the landlord's credit card belongs to. I can only say a general situation. Generally speaking, banks now have two ways to check their credit card bills, including whether they owe money, and so on:

The first is online inquiry: you can easily inquire about your current arrears through the online banking of various banks. The landlord only needs to click here to log in to the bank credit card official website: click "System Login" at the lower right to enter the login page, and enter the credit card number query password to query the current debt situation. If you haven't opened bank online banking, you can open bank credit card online banking first, and then make an inquiry. The method is the same.

The second type is telephone inquiry: the landlord can make a bank credit card and then directly transfer it to manual service, and then you can ask customer service to inquire about your current arrears.

It is suggested that the landlord should pay off the arrears as soon as possible if he finds any arrears, otherwise the consumption record will be bad after the deadline, which is very bad. I hope my answer can help the landlord!