My FP notice was sent on Mar 13 but until yesterday I didn't get the notification. I was getting worried and called USCIS yesterday but as usual the service representative told me to wait 30 days. With my persistence this morning I convinced the rep to let me talk to tier2 officer. He was a professional and took my case number and asked for the address. He discovered that USCIS had sent it to wrong zip code. Funny thing is that address was right except the zip. Anyways he just faxed the FP notice. Thanks God the pain is over. My appointment is in 2 days and you can imagine if I didn't call this morning.
So my advice is to call them if you feel that something is not right.
So my advice is to call them if you feel that something is not right.