The history of American currency issuance is very complicated. At the beginning of the 20th century, there were mainly silver coupons (silver? Certificate, blue printed ticket, issued by 1878, 1968 cannot be converted into silver coins), gold coin coupon (gold? Certificate, yellow stamp, 1870 issued, 1933 cannot be converted into gold coins), national debt (joint? Country? Remarks, red seal, 1928), and so on.

All three are issued by the government, and the national debt is issued in the name of the Ministry of Finance. I won't say the rest one by one.