Letter of Reference - Contact Info Is Important by: Lanard
A Letter of Reference is not worth as much to you without accurate contact information as is one with good contact information; whether it's email addresses; work, home and cell phone numbers; or office mailing addresses.
One problem is that it slows down the job interview and hiring process; college admissions, graduate school admissions, acceptance to civic organizations and boards, etc.
People doing reference checks might call a couple of times, but don't expect them to make many more calls than that. In fact, you can almost depend on them moving on to the next best candidate for whatever it is you're applying for.