My take is with FRNs you basically have "U.S. Plantation Scrip". Outside of the plantation there is lawful money. Since maybe late 1960s FRNs can double as US Notes. But I figure it depends on the accounting. FRNs are like or are clearinghouse certificates good for credit in the banking clearinghouse system--to knowledge each Federal Reserve Bank is a clearinghouse corporation. However, outside of the Federal Reserve Districts -> lawful money. Redeeming clearinghouse credit is like redeeming a coupon in a sense. Leaving a Casino? You cash your chips right? If you want to money ledgered as lawful money then you redeem it for lawful money.
David Merrill sees a deeper esoteric aspect of redeeming lawful money. In a sense, to keep arms length or better from the speculative, elastic-currency realm of souless corporations you actively redeem clearinghouse certificates intended for Federal Reserve District banking corporations.
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