they probably know you're listed as a reference, but they could call them willy nilly, and you wouldn't even know. They ...
If you have a certificate that's not up to date, it's not doing you any favors on your résumé — especially if it's not ...
If you are enclosing a single document (e.g., a resume,) include "Enclosure" two spaces under your name; if you are enclosing more than one document (e.g., writing sample, transcript, list of ...