I got AOR from Buffalo last week (is that a letter with a lot of stickers?). While I send my application to the Buffalo office, I haven't received the FBI PCC (it's already deadline). My question is that, once I receive the FBI PCC (probably next week), whether I can send the FBI PCC to the Buffalo office with the sticker or I need to wait for their additional document request. Sorry for my lack of knowledge in this process. Any reply is deeply appreciated.