I was told that you could just leave that part blank and then you'd be able to read it, without actually stating that you did not waive your right to read it. However, one of my letter writers asked me to sign it b/c they wanted to follow the rules and include in their letter that I waived my right. My other letter writers did not include it in their letters and didn't ask me to sign the waiver either way.
I was out of town when a couple of my letters made it into the office at my school, so I didn't get to read them and knew they'd be great letters anyway, that's why I asked those people to write me letters. Well, at one of my interviews I got a chance to look at one of those and guess what?- the guy who wrote it, who knew me pretty well, used a different first name while refrring to me in one part of the letter. I'm pretty sure it was b/c he wrote so many letters and was just using a basic format for many of those glowingly nice sentences and filling in the blanks on the name and maybe didn't change that part. Anyway, I can't help but think that was kind of a bad reflection. My school had us read our own Dean's letters so they could correct minor errors like that. I wish I'd read all of mine. In the whole scheme of things, it probably doesn't matter much b/c I doubt they read the letters all that carefully, but I kind of wish I'd read that one and maybe could have had the mistake corrected.