LD申请了capital one的credit card,没有收入,但有itin。过几天capital one来信 要annual income, 其他几个要求比如w2都不行,但觉得这个应该还可以 if you're at least 21 years old and included income from someone else paying your expense: letter detailing the amount and frequency of the income, signed by the person paying your expense. 请问该怎么弄,写封信签上名就可以了么?