I really don’t know why they sent your file to Niagara Falls office. But I hope it’s not something negative, you have been approved so just wait for the medical request and other procedures. Atleast you got it , seems like they are working on May/June 2017 applications. I saw another thread where someone got a refusal who applied on June 2017. Which is sad. We all are in the same boat and waiting for something good to happen.Application received May-2017
Processed in February - 2018.
and got the letter last week. dated August 31, 2018
So how long it takes to make those checks? and it says they returned my file to Niagara falls office to proceed in the processing of my application! so don't know what that means?