On Fri, 4 Jul 2003 13:55:20 -0500 (CDT), (mikeyok)
wrote:

Can anyone tell me what the difference is between a red and a blue
certificate is? Thanks in advance.......

Mike,
What series are the notes?

I've cross-posted this to rec.collecting paper-money, where you
might get a more complete response.

take care,
Scott