Are 'Odd' Denominations Still Legal Tender?

I've seen people pay for snacks at gas stations with $2 bills

I am genuinely curious about the U.S. issued coins for the Philippines. They were issued by the U.S. and they say 'United States of America.' The coins were minted at U.S. mints, including the one in Manila, which was an official U.S. branch mint (as is San Francisco, Denver, etc., though the only one that was overseas). I suspect at the time they were issued, they could not be used in the U.S. proper, but if the Coinage Act of 1965 declared that ALL US coins were legal tender, then it seems that they have been officially monetized. Does anybody know if this specific issue has been addressed or is it something that nobody has really thought about because the idea is 'too crazy?'

So, where can I spend my U.S. Centavos and Pesos? This would be a fun one to try to deposit into my bank account

You can't spend Philippine money coined by the US Mint for the same reason you can't spend Dominican money coined there, or any of the other countries we've struck coinage for.

SEC. 102. All coins and currencies of the United States (including Federal Reserve notes and circulating notes of Federal Reserve banks and national banking associations), regardless of when coined or issued, shall be legal tender for all debts, public and private, public charges, taxes, duties, and dues.

Interesting question, as technically the Philippines Insular government reported to the Bureau of Insular Affairs and was part of the United States.

I'm not sure if any law specified whether the Philippine Peso of 1902-1945 is/was legal tender stateside... I think that Hawaiian currency from the same time period is not legal tender, plus the Constitution says that the legal tender of the US is the dollar, not the peso. A more clear answer would probably be derived from the 1857 law that made it illegal to use the Spanish dollar in the US.

And I realize it's probably a matter of semantics, but I do wonder what would technically be the earliest coin that is legal tender today. I think it's generally established that the Continental Currency and earlier colonial issues are not legal tender, whereas the 1793 and later issues are. That leaves the Fugio cent and 1792 birch cent and disme in a grey area--after the Constitution, but before the Coinage Act of 1793. All of those circulated into the early 19th century, so I'm inclined to say that the Fugio cent is the oldest legal tender in the US.

Again with the semantics; I think one could consider the $100,000 bill as the only *denomination* that has been demonetized, as it was only legal for government transactions which are currently digital.

And would silver certificates and gold certificates be considered semi-demonetized as they are still legal tender at their face value for all debts public and private but have lost their power to be redeemed in their respective precious metals.

Any bills that are considered "greenbacks" or whatever the heck you call it are still legal tenders. I'm guessing any coin issued by the mint is still a legal tender, other than the Trade dollar.

Imagine just walking into a post office and buying a stamp with a 3 cent nickel.

I am giving you a weird look for even suggesting it.