To avoid it, just don't use it! I'm not sure what you're trying to say. It's hard to tell, since you haven't given us a whole sentence, but I don't think you're using "not to mention" in the ordinary way.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousHow would you avoid not to mention here ?"The guy, not to mention his name, ...."Thank youMaybe you're looking for this.