Article 1, Section 10, it is forbidden to "coin money; emit bills of credit; make any thing but gold and silver coin a tender in payments of debts."
The Fed issued the first notes in 1914, which stated: "This Note is Redeemable in Gold on Demand." This was fine.
The text was revised in 1950 to say: "This Note is Redeemable in Lawful Money." This was fine as well since "lawful money" is gold or silver.
However, in 1964, the text was changed to: "This Note is Legal Tender for all Debts, Public and Private." All notes since 1964 are illegal under the U.S. Constitution since they cannot be exchanged for gold or silver.
Interesting, huh?
The Fed issued the first notes in 1914, which stated: "This Note is Redeemable in Gold on Demand." This was fine.
The text was revised in 1950 to say: "This Note is Redeemable in Lawful Money." This was fine as well since "lawful money" is gold or silver.
However, in 1964, the text was changed to: "This Note is Legal Tender for all Debts, Public and Private." All notes since 1964 are illegal under the U.S. Constitution since they cannot be exchanged for gold or silver.
Interesting, huh?