Are you unsure if your professional correspondence contains proper grammar? I find run-on sentences are the biggest errors in transcripts that I edit. You can’t just run sentences together! You need a comma and conjunction or at least a semicolon. Here’s a link to help you identify run-on sentences and comma splices and how to avoid them!
http://www.ccc.commnet.edu/grammar/runons.htm
If that’s not something you care to learn, let us take care of producing your letters! Just dictate into your phone, send it to us, and we’ll produce a document that won’t make you look like you slept through English class!