My father would like to have his B2 visa extended. It is good for 10 years and he's current stay expires in Feb 05. When he originally applied for a visa at the embassy, he submitted the Affidavit of Support, provided by me, indicating that I will sponsor his stay in the US. My question is, since USCIS requires the bank documents for the extension of stay, can I again submit the Affidavit of Support since I'm sponsoring his stay or does he absolutely need to submit his bank statement?