I just thought I saw a guy hand Trump some money to sign his jacket

[sarisataka]

6. Defacement of Currency

Defacement of Currency

Defacement of currency is a violation of Title 18, Section 333 of the United States Code. Under this provision, currency defacement is generally defined as follows: Whoever mutilates, cuts, disfigures, perforates, unites or cements together, or does any other thing to any bank bill, draft, note, or other evidence of debt issued by any national banking association, Federal Reserve Bank, or Federal Reserve System, with intent to render such item(s) unfit to be reissued, shall be fined under this title or imprisoned not more than six months, or both.

https://www.moneyfactory.gov/resources/lawsandregulations.html

Seems to be OK unless it makes the bill unusable