Just sign your mother's signature, because the bank's rule is that cardholders must sign in person, so the building team can read it for themselves. You can sign your mother's signature on the back of the card yourself. I think using credit cards can accumulate credit. The landlord can handle the card himself. If the main card can't be applied, he can apply for a secondary card. Because your mother can apply for a primary card and a secondary card. As long as you provide a copy of your ID card, all banks can accept it. This is helpful for future employment.