Hello All, I was able to mail my AOS Concurrent Filing (i-130,i-485,i-765,i-131) on December 5, 2016 to Chicago Lockbox. I used Priority Mail Box and mailed it at the PO Box address of Chicago Lockbox with tracking. Important thing to note for people who mail their AOS in second half of December is that the new fees comes into Effect post Dec 23. So please be careful about that. Intent of starting this thread is for people on similar timeline as mine Best of Luck to everybody Cheers