I was not aware of legal tender cases involving places that only accepted bills of $20 or less. I saw signs in gas stations and dollar stores saying that the cashier can only accept that, but I did not know that anyone could actually challenge this policy. The federal government determines the value of legal tender. Fiat money is a term that refers to printed money that has no intrinsic value. Depending on its physical composition, a $20 bill has no more value than a $1 bill. Its value comes from the Federal Reserve. Note that the US dollar is the country`s only legal tender. Non-US currencies and various cryptocurrencies are sometimes accepted, but business owners should convert these currencies into dollars to pay taxes and transfer the proceeds of a sale to a bank account. Legal tender refers to all U.S. coins and currencies issued by the government. U.S. cash dollars are also valid forms of legal tender. Nevertheless, federal laws do not require a seller to accept cash as legal tender for payment for goods or services that have been provided.
This allows companies to establish their own policies on accepting cash as legal tender. Legal tender also includes Federal Reserve notes as well as bank notes from Federal Reserve banks and national banking associations for the purpose of settling public and private debts, duties, fees and taxes. Legal tender generally does not include personal checks, credit cards or other general forms of non-cash payments. In some cases, foreign currency may be accepted as legal tender. In addition, legal tender can only be used in connection with the repayment of debts. Here is a history (mainly focused on the United States) of notable events in legal tender law: Legal tender is the currency that national law requires as valid payment of debts, taxes or fees. When the Iraqi Swiss dinar ceased to be legal tender in Iraq, it was still circulating in the northern Kurdish regions and had a stable market value for more than a decade despite the lack of state support. This example is often cited to show that the value of a currency is not derived solely from its legal status (but that this currency would not be legal tender). The New Taiwan Dollar issued by the Central Bank of the Republic of China (Taiwan) is legal tender for all payments made in the territory of the Republic of China, Taiwan.
 However, since 2007, candidates for election officials in the Republic of China are no longer allowed to file a deposit.  In 1914, the Banking Amendment Act gave legal tender to each issuer`s banknotes and removed the requirement that banks authorized to issue banknotes exchange them for gold on demand (the gold standard). In general, legal tender can take two basic forms. A government can simply ratify a market-based commodity money like gold as legal tender and agree to accept the payment of taxes and execute contracts denominated in that commodity. Alternatively, a government may declare a counterfeit commodity or a worthless token as legal tender, which then adopts the characteristics of a fiat currency. In 1862, the U.S. government passed the Legal Tender Act, which allowed printed dollar bills as an official offer in the country. The government gave this act to finance the civil war. However, it is of paramount importance today because the USD is the most used currency in the world. Cent coins are also legally accepted in the United States. Meanwhile, some currencies, especially the U.S.
dollar, are considered legal tender in countries that do not issue their own currencies. Ecuador, which does not issue legal tender, has used the US dollar as its legal tender since 2000. This practice of using the United States The dollar, as the main currency of a country, is called “dollarization”. At that time, a particular currency was not considered legal tender, although it could be used as a “legal cash reserve” by national banking associations. Thus, the term “legal tender” had a broader meaning than the term “legal tender”. In order to comply with the legal definition of “legal tender”, the exact amount due must be offered; No changes can be requested.  At the beginning of the American Civil War, the federal government first issued U.S. notes (the first greenbacks) that were not exchangeable for gold and silver coins, but could be used to pay “all fees” to the federal government. Since land purchases and import duties could only be paid in gold or new demand notes, demand notes were bought by importers and land speculators for about 97 cents on the gold dollar and never lost value. 1862 Greenbacks (legal tender notes) initially traded at 97 cents on the dollar, but gained/lost value depending on the fate of the Union army. The value of legal tender greenbacks fluctuated considerably, but trading fluctuated between 85 and 33 cents per dollar of gold. Legal tender makes it possible to send money abroad, settle debts and make public and private payments.