Craig writes:

Read it.
Crap does not matter other than what it said on the check. Nothing on
the
check
obligated one to anything.
What was in the letter? - Lot of glowing stuff. But it does not matter.

Jeerz. You know, if I'd known that, I'd have ignored the letter that came with
my last book advance, cashed the check and gone on my way.

You may well find yourself obligated to something you don't want to do--pay for
what you are getting.

Claiming there was no letter in your particular check might work, but it also
might not, and could end up with some nasty notes to your local not-so-friendly
credit bureau.

Good luck.

Charlie Self
"I think the most un-American thing you can say is, 'You can't say that.'"
Garrison Keillor