American Money
The United States issues paper currency and coins to pay for purchases, taxes, and debts.
Paper Money
American paper currency is issued in several denominations: $1, $2, $5, $10, $20, $50, and $100. The Bureau of Engraving and Printing manufactures paper money. It also redesigns money, with new appearances and enhanced security features to prevent counterfeiting. You can purchase commemorative or bulk versions of American currency through the Bureau’s Money Store.
The United States no longer issues bills in larger denominations, such as $500, $1,000, $5,000, and $10,000 bills. However, they are still legal tender and may still be in circulation.
Coins
The United States issues several denominations, with the most common being: 1¢, 5¢, 10¢, 25¢, 50¢, and $1. The U.S. Mint is responsible for manufacturing and circulating coins to pay for goods and services. It also issues collectible and commemorative coins that honor a person, place, or event and are available for purchase.
Mutilated Money
If you have paper money that is extremely damaged, you can redeem it with the Bureau of Engraving and Printing. Examples of damaged paper money include bills that are less than one half of the bill, or in such a condition that you are unable to tell the denomination of the bill. If you have paper money that is dirty, defaced, torn, or more than half of the original size, you can take it to your local bank to exchange it for a bill that is in better shape.
The U.S. Mint has suspended its exchange program for coins that are fused, melted, or mutilated in any other way. Visit your local bank to exchange other coins that aren’t severely damaged.
From: https://www.usa.gov/life-in-the-us