回复：Do you still have the copy of the RFE letter? -回复：Urgent help

yes, I do have a copy of the RFE letter. There is only a mailing address at the bottom of the letter, saying any questions related to the application, use this mailing address. We're going to use this address if there's no other way out. My LG has the letter now, I will ask him to confirm again whether there is any other addresses on the letter.

Will there be a problem for not using the original envelop?

THANKS!!!