I don't think this letter is genuine. Am I the only one?
Some the language sounds like someone mocking Watchtower speak rather than genuine Watchtower speak.
For example, I don't think it is typical for letters to direct elders to "convey the information". Letters are either read to the congregation or they are not. This seems uncharacteristically ambiguous. How is the information supposed to be conveyed?
Plus I don't think Watchtower commonly refers to comments by Paul as "a piece of advice". It's just odd language.