A bank note is a piece of paper money issued by a central bank that represents a promise to pay the holder a certain amount of value

When you hold a $20 bill, you are holding a bank note. It is not backed by gold or silver sitting in a vault — it is backed by the government's promise that the note has value and can be exchanged for goods and services. The Federal Reserve, which is the central bank of the United States, prints all U.S. bank notes. Other countries have their own central banks that print their own notes: the Bank of England prints British pounds, the European Central Bank prints euros, and so on.

A bank note is different from a check or a digital payment. A check is a written instruction to move money from one account to another. A digital payment is an electronic transfer. A bank note is physical currency — you can hold it, spend it directly, and no bank or payment system needs to process it. When you hand someone a $5 note, the transaction is complete. No record is kept, no fee is charged, and no third party is involved.

Key Takeaways

  • Bank notes are physical paper money issued by a country's central bank and represent a legal promise of value.
  • Unlike checks or digital transfers, a bank note requires no processing, no account, and no third party to complete a transaction.
  • Each bank note has security features — watermarks, color-shifting ink, security threads — designed to prevent counterfeiting.
  • Bank notes remain legal tender even when they are old, torn, or no longer printed, and can usually be exchanged at a bank for replacement notes.

How a bank note gets its value

A bank note has value because a government declares it legal tender and people trust that declaration. This is called fiat currency — money that has value by government order, not because it is made of something valuable. The U.S. dollar is fiat currency. You cannot walk into the Federal Reserve and exchange a $100 note for $100 worth of gold.

The value of a bank note also depends on how many notes are in circulation and how stable the economy is. If a central bank prints far too many notes without a corresponding increase in goods and services, the value of each note falls — this is inflation. If a central bank is trusted to manage the money supply carefully, people hold onto notes and use them for transactions. If trust breaks down, people may refuse to use the notes or demand goods in exchange for them instead.

Security features that prevent counterfeiting

Modern bank notes include multiple security features that are difficult to copy. U.S. bills include a security thread embedded in the paper, a watermark that shows the face of the person on the bill, and color-shifting ink on the lower right corner that changes color when you tilt the note. Newer bills also include a security ribbon woven into the paper that shows images and text when held to light.

These features exist because counterfeiting — making fake bank notes — is a federal crime. The Secret Service, not the FBI, investigates counterfeiting in the United States. If you receive a counterfeit note, you should not spend it or try to pass it on. Instead, contact your local police or the Secret Service. Spending a counterfeit note, even if you did not know it was fake, can result in criminal charges.

What happens to old or damaged bank notes

Bank notes wear out over time. A $1 bill lasts about 5.8 years in circulation before it becomes too worn to use. A $100 bill lasts about 15 years. When a note becomes torn, faded, or otherwise damaged, you can take it to your bank and exchange it for a new note of the same value at no cost. The bank sends damaged notes to the Federal Reserve, which removes them from circulation and destroys them.

If a note is partially destroyed — for example, if half of it is burned or torn away — you can still exchange it. The Bureau of Engraving and Printing has a Mutilated Currency Division that examines damaged notes and determines whether they can be replaced. If more than half of the note remains and is identifiable, you can usually get a replacement. The process can take several weeks.

Bank notes versus coins

Both bank notes and coins are forms of physical currency issued by a central bank or government mint. The difference is material and durability. A bank note is made of paper (actually a blend of 75% cotton and 25% linen), while a coin is made of metal. Coins last much longer — a penny can stay in circulation for 25 years or more — but they are heavier and take up more space. Bank notes are lighter and easier to carry in large quantities.

In the United States, the Federal Reserve decides which denominations of notes and coins to print and mint based on demand. Coins are produced by the U.S. Mint, while notes are produced by the Bureau of Engraving and Printing. Both are legal tender and can be used interchangeably to pay for goods and services.

Why some people still prefer bank notes over digital payments

Bank notes require no technology, no account, and no internet connection. You can use them anywhere, anytime, without worrying about whether a payment system is down or whether your bank is processing the transaction. For this reason, some people prefer to keep cash on hand for emergencies or for purchases where they want no record of the transaction.

Bank notes also work across borders more easily than digital payments, though you will need to exchange them for the local currency. If you travel to another country, you can exchange your bank notes at a bank or currency exchange service. Digital payments often require a bank account in that country or a payment system that operates there.

The decline of bank notes in daily use

The use of physical bank notes has declined in many developed countries as digital payments have become more common. Credit cards, debit cards, mobile wallets, and bank transfers now account for the majority of transactions in the United States. However, bank notes remain legal tender and are still printed by the Federal Reserve, though in smaller quantities than in the past.

Some countries have moved faster toward cashless systems than others. Sweden, for example, has very few cash transactions, and some businesses no longer accept bank notes. The United States has not moved in this direction — the Federal Reserve continues to print notes, and many people and businesses still rely on cash for at least some transactions.

Frequently Asked Questions

Can I use an old bank note that is no longer printed?

Yes. All U.S. bank notes remain legal tender, even if they are no longer printed. A $2 bill, for example, is still printed but in small quantities, and older versions are still worth $2. You can spend old notes or exchange them at a bank for current notes.

What should I do if I find a counterfeit bank note?

Do not spend it. Contact your local police department or the U.S. Secret Service. If you received it from a business or bank, report that too. Spending a counterfeit note is a federal crime, even if you did not know it was fake.

Why does the Federal Reserve print new bank notes every year?

Bank notes wear out and need to be replaced. The Federal Reserve also prints new notes to replace those that are damaged, lost, or destroyed. The amount printed each year depends on demand from banks and businesses.

Can I exchange a torn bank note at any bank?

Most banks will exchange a torn or damaged note for a new one at no cost. If the damage is severe, the bank may send it to the Federal Reserve's Mutilated Currency Division, which can take several weeks. Call your bank first to ask about their process.

Is there a limit to how much cash I can carry?

There is no legal limit to how much cash you can carry in the United States. However, if you cross a border with more than $10,000 in cash, you must report it to customs. Failing to report can result in the cash being seized.