Oh, I would kill to see what my intrroductory letter said when I last changed congregations.
Actually, most people on this board would be shocked at the content and quality of the vast majority of "letters of introduction." While the role of Secretary is arguably one of the most important in the congo, and clearly should be given to someone with exceptional organizational and communication skills, it is the least-sought job on the body of elders. No one wants it so it's often assigned to the least qualified brother of the bunch, usually the new guy. The people with communication skills all want to be teachers so they want the school or the WT Study. The main reason no one wants to be Secretary is you have to be present and accountable. A secretary collects and answers all the mail, keeps all the records, and generally handles all the congo paperwork, including the filing system. It's a huge job and requires constant attention to detail.
I probably saw hundreds of such letters in my day, and the vast majority were poorly written, full of misspelled words, poor grammar, lousy syntax and often incomprehensible (and badly formatted, too). It was fairly common for elders to look at each other after such a letter was read aloud at an elder's meeting and say, "What's that mean?" It often wasn't clear what was being said.
My favorite was the one (and there were way more than one) that, after citing a long list of problems a particular brother, sister, or entire family had, closed with: "We are happy to send you the cards of ...."
To which someone would always reply, "I bet they are very happy to be sending us their cards." In other words, they were glad to be rid of so-and-so and their many problems although they probably didn't mean for it to sound like that. Or maybe they did.