Assorted U.S. dollar bills. Some are torn, missing pieces or drawn upon, and some are in good condition.

The high-tech, super-secure government warehouse where old cash dies

The $5 bill in your wallet. The $20 bill in the cash register. The $100 bill at the bank. You may be using less cash day-to-day, but some $2 trillion of paper currency keeps the economy churning so that people can exchange, handle and spend money with ease.

But wait, does that $20 bill have a tear down the middle? Did someone take a Sharpie to that $100 bill?

If so, it is time for the Federal Reserve to step in. It is one of the central bank’s lesser-known, but hugely significant roles: inspecting millions of paper notes every year so you can actually use all the bills that wind up in your wallet.

On a July afternoon, we watched the process unfold at a Baltimore facility that is part of the Richmond Fed. The various steps link together armored carriers, experienced staffers, high-velocity machines and, for the bills that meet their end, a dumpster full of shredded, used-to-be-money confetti. (We’ve lined up some faulty bills so you can test your knowledge here, too.)

The journey takes place almost entirely behind the scenes, securely shielded from public view. When run smoothly, it makes it possible for us all to use cash without a second thought. It is a bedrock of the economy. And here’s how it works.

An employee moves containers of currency to the processing room at the Federal Reserve Bank of Richmond in Baltimore on July 12.
The number 1 illustrated in a black and white line etching style.

First, armored carriers pull up to Fed facilities with bags of cash: $1, $2, $5, $10, $20, $50 and $100 bills.

An employee fulfills orders at the Federal Reserve Bank of Richmond in Baltimore on July 12. (Hannah Yoon for The Washington Post)

The trucks are like middlemen between banks ready to have their cash inspected and the Fed, which receives the bills through high-security doors and windows.

Inspection teams take the cash out of sealed plastic bags and manually count the number of “straps” and “bundles” — 100 notes per strap, 10 straps per bundle. From there, the money is packed into locked carts and wheeled down the hall. At the Baltimore facility, the bills are either headed for a seven-story vault (equipped with a crane system) for inspection later on, or straight for processing.

BALTIMORE, MD - JULY 12, 2023: Bundles of currency at The Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023. (Photo by Hannah Yoon for The Washington Post)
BALTIMORE, MD - JULY 12, 2023: Currency sit in a container at The Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)
The number 2 illustrated in a black and white line etching style.

The bills — whether they just arrived or have been stashed in the vault — are now ready for inspection.

BALTIMORE, MD - JULY 12, 2023:  An employee works with a currency processor to check for fit currency at the Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)
BALTIMORE, MD - JULY 12, 2023:  An employee works with a currency processor to check for fit currency at the Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)

One denomination at a time, inspection teams load bills onto the belts of high-velocity machines.

Inside, sharp scanners search for anything amiss: tears, markings, stains, counterfeit labels. The bulk of the bills pass the test.

Sometimes, it is obvious when a bill has run its course. But with some bills, you have to look a little closer — or get a state-of-the-art scanner to take a second look.

See if you can spot the bills that are not fit for use.

You’re up, inspector! Select the four bills that would not pass:
U.S. dollar bill.
U.S. dollar bill.
U.S. dollar bill.
U.S. dollar bill.
U.S. dollar bill.
U.S. dollar bill.
4 remaining
The number 3 illustrated in a black and white line etching style.

The bills that pass inspection get repackaged in straps and bundles by Fed staffers. They are then sealed into secure plastic bags.

To fill currency orders from banks, staffers use a crane to pull bundles from the vault, much like an Ikea or Home Depot warehouse. Or they will draw from the cash that was just inspected and repackaged.

BALTIMORE, MD - JULY 12, 2023: Containers full of currency sit inside the vault at The Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)

Then the bundles are packed into locked carts and wheeled back out to the armored carriers, where they head back out into the world.

BALTIMORE, MD - JULY 12, 2023: Bags of fit currency ready to be shipped out sit in a shipping container at The Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)
BALTIMORE, MD - JULY 12, 2023: A container full of currency sits inside the vault at The Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)

The rejects stay behind.

Some immediately head to a shredder that blitzes them into pieces the size of a grain of rice.

A thick plastic tube then suctions up those tiny money bits and carries the remains out of the machine and through a winding series of pipes, which pump the shredded cash into a massive brown dumpster outside the building. (Others that look questionable and got a second look at a “reconciliation station” will also ultimately be destroyed.)

BALTIMORE, MD - JULY 12, 2023:  An employee works at the reconciliation station to manually process currency at the Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023. Fit currency is any currency the currency processor deems as adequate to put back into the public. (Photo by Hannah Yoon for The Washington Post)
BALTIMORE, MD - JULY 12, 2023:  An employee works at the reconciliation station to manually process currency at the Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023. Fit currency is any currency the currency processor deems as adequate to put back into the public. (Photo by Hannah Yoon for The Washington Post)
BALTIMORE, MD - JULY 12, 2023:  An employee works at the reconciliation station to manually process currency at the Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023. Fit currency is any currency the currency processor deems as adequate to put back into the public. (Photo by Hannah Yoon for The Washington Post)
The number 4 illustrated in a black and white line etching style.

The 6-ton dumpster of shredded money fills up roughly once per week.

BALTIMORE, MD - JULY 12, 2023: The garbage container sits outside the Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)

Various Federal Reserve banks recycle the shreds in different ways. Some use it for compost, building insulation or cement. Some use it to generate electricity. Others turn it into trinkets, like snow globes or piggy banks filled with shredded money — a second act for that blemished bill.

BALTIMORE, MD - JULY 12, 2023: Shredded currency falls into the garbage container at The Federal Reserve Bank of Richmond in Baltimore, MD. on Wednesday, July 12, 2023.(Photo by Hannah Yoon for The Washington Post)
About this story

Editing by Jayne Orenstein, Haley Hamblin, Betty Chavaria, Karly Domb Sadof and Mike Madden. Copy editing by Dorine Bethea.