Compare the Nigerian letter with this genuine (I presume) letter from Ghana which includes the closing c: circuit overseers, and code 9/27/17-E, plus clear instructions on who the letter is to be shared with. The Nigerian letter lacks these features, in addition to the odd language noted above.
https://jw.servehttp.com/en/letter.php?is=20170927LTC_gh.pdf
Plus, a small thing, but there's not enough space between the date and "TO ALL..." in the Nigerian letter.
Here is another genuine letter from Ghana to compare. Again notice the clear instructions on how the information is to be shared. Plus the format.
https://jw.servehttp.com/en/letter.php?is=20170920LTC_gh.pdf