I have just sent in my application for waiver on persecution basis.
So far my progress is a check cashed by USCIS at the end of September 2018 and DOS website showing "documents received" beginning of October 2018.
My lawyer said I would receive a receipt from USCIS with my case # within 30 days of application. So it has been longer than 30 days now since USCIS cashed the check. Should I be worried? When you say "December 11, 2017: I-612 received by USCIS" is this the date from your USCIS receipt or the date USCIS cashed $930 check?