Actually let me go research this some more. I looked at it and they all say "Made in America", not necessarily USPCC. I'm 99% certain they are printed by the USPCC, and if you're asking about the quality, the quality is top notch (better than your standard cards by far). I've heard people say that they're produced by the USPCC, but not seen it on TXI.
A moderator can probably help you out better.
Sorry for the inconvenience!