American defacement law

Please carefully read Title 18, Section 333 of The United States Code:

Whoever mutilates, cuts, defaces, disfigures, or perforates, or 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, or Federal Reserve bank, or the Federal Reserve System, with intent to render such bank bill, draft, note, or other evidence of debt unfit to be reissued, shall be fined under this title or imprisoned not more than six months, or both.

There you have it

with intent to render such bank bill … unfit to be reissued

And 'there you have it' is right. Canadian law is similar, except it says 'currency'.

We most definitely want our bills reissued, so then there is no problemo!