Im in agreement with Michael here, if you have done nothing wrong, which it sounds like you havent, name them.

Also in future, no mattr who you are dealing with, make sure you get at least 50% payment upfront and only upload the 2257 docs after full payment has been made, that way, if they use the content without paying for it, you can go right to the feds and say 'hey, this guy doesnt have docs for the content, go check him out'.

Regards,

Lee