I also received a letter and believe that it is a scam. So, I definitely will not be contacting them. The PO Box address is a dead giveaway. Be careful out there!

This is a scam i'm sure--got a letter from them with the return address "Federal Debt Reduction Initiative" --when i searched on google and clicked on a site i got a notice my computer was trying to be attacked (thanks to Norton this did not happen) - also, they are using a pay mail box that anyone can rent through those postal services. I did not call their 888 678-5652 # because they would probably haunt one forever calling back

not a call but a letter for me to call them.  It looks like an official letter from Wash, DC offering Fed Debt Reduction.  I suspect it is fraudulent.  I'm not sure.