Tried? There is no middle road. If they say they are fake, they are fake. There is no trying to prove anything. It is the same as if you printed on a piece of paper that whatever country you are domiciled in, I suspect outside of the US, owes you money and you demand payment. They say no we don't, you sue, the Judge dismisses the case. If the US Government says that your bonds are fake, buddy, you are not going to get paid for them no matter how much of a temper tantrum you throw.
Let me try to paint it in very simple fashion. The US pays a very low interest rate on its debt for a reason, no valid debt-holder is ever withheld payment and is always paid back on time with their interest. Thus, the US T-bill market is the most liquid market in the world. To put it in very basic terms, if the US government arbitrarily said that it would not pay valid treasury debt at will, there would be a massive risk premium in the market, and, no institution would participate given the massive risk. (Obviously the debt ceiling debacle is a whole different fight altogether.)
Thus, if the US Government says that any purported 'bonds' are fake, they are definitely fake.
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