I received the same letter today,, actually did some research on it,, years back they wanted the "invitation" letter mailed to Dallas Texas,, well, I found out through my research that it was mailed from Dallas Texas (zip code mailed from) then they mailed it to me in Alabama,, and wanted me to mail it to Utah, I looked up the address in Utah,, it's not a business or anything like that,, it's a post office,, There has even been a news report done on it,, I saw that on youtube,, I don't know how long your letter was but mine was 12 pages front and back,, and if I had been so gullible to fall into this scam,,, they shot themselves in the foot,, lol,, they said to mail it no later than the 14th which was yesterday,, SMH