To tell a big truth:

Paper money, that is, "money", is issued by banks and circulated in the market. The bank has a responsible "head". American banks are "private", and no one can represent "the whole country", only the "Minister of Finance" has this right. So with his "printed signature", there is "responsibility attribution".

In China, 50 years ago, shortly after the founding of the People's Republic of China, the bank notes were printed with the seal of the governor and the seal of the deputy governor.

Later, the responsible person came down to "a president", so there is only one seal left on the back of our money now, which is the president's seal. It is a square seal script, which is a "long" from the upper right, and the "zhi" in the upper left corner is an ancient seal script that writes "zhi".

Otherwise, do you dare to use other people's printed money casually? Do you trust? Right?