That envelope you just dropped in the blue USPS box on the corner? The one with a check to your landlord or the electric company? There’s a decent chance someone is going to fish it out tonight, bleach your handwriting off the paper, and cash it for ten times what you wrote it for.
This isn’t some rare, sophisticated crime. Mail theft-related check fraud has absolutely exploded in the last few years, and the one thing thieves are hunting for above everything else is a paper check. Not your Amazon packages. Not your birthday cards (well, unless there’s a check inside). They want checks — personal checks, business checks, government checks — because a single stolen check is a golden ticket to your bank account.
Let me walk you through exactly how this works, why it’s gotten so out of control, and — more importantly — what you can actually do about it starting today.
Why Thieves Want Checks More Than Anything Else in Your Mailbox
Think about what’s on a check: your full name, your address, your bank’s name, your routing number, your account number, your signature, and the name and address of whoever you’re paying. That’s a staggering amount of information on one little piece of paper. Criminals can use all of it.
But here’s what makes checks even more attractive than, say, stealing a credit card number: check fraud doesn’t trigger instant fraud alerts the way a suspicious credit card charge does. When someone deposits a washed or forged check, the bank often makes the funds available within a day or two — required by federal regulations — and by the time anyone realizes something is wrong, the money is gone and the criminal is a ghost. Credit cards have real-time monitoring. Checks? Not so much.
Check washing alone costs Americans over $1 billion every single year. And that number is climbing fast.
How They’re Actually Doing It
There are two main techniques, and both are disturbingly simple.
The first is check washing. The thief takes your stolen check and soaks it in common chemicals — acetone (which is just nail polish remover), bleach, or other solvents you can buy at any Dollar Tree. The ink dissolves right off the paper. Now they’ve got a blank check with your real signature, your real account number, and your real routing number. They write in a new name and a new amount — usually thousands of dollars — and deposit it. One woman reported that her $25 check was washed and cashed for $2,500. A $150 phone bill payment got turned into a $7,000 payday.
The second technique is called check cooking. This one’s more high-tech. Thieves scan or photograph your check, then use photo editing software to digitally alter the image. They print new checks using high-quality printers — sometimes dozens of checks from a single stolen original. These cooked checks are often written for smaller amounts to fly under the radar.
And here’s the kicker: many of these criminals never even step inside a bank. They deposit checks through mobile banking apps, ATMs, or online accounts they’ve opened with fake information. They don’t have to look anyone in the eye.
The Numbers Are Insane
Between February and August 2023, the Treasury Department received over 15,400 reports of suspected mail theft-related check fraud from more than 840 financial institutions. Those reports added up to more than $688 million in suspicious activity. In just six months.
The USPS recorded over 52,000 high-volume mail theft attacks in fiscal year 2024 — that’s up 2,238% since 2010. Robberies of postal carriers have jumped over 800%. In 2023 alone, there were 628 robberies of postal employees, often by people demanding their “arrow key” — a master key that opens blue collection boxes and cluster mailboxes across entire neighborhoods. One stolen key can give a thief access to thousands of envelopes every day.
Stolen checks are even being sold on the dark web and encrypted messaging apps. Personal checks go for $200 to $300 each. Business checks sell for $250 to $600. Thieves brag about their hauls and post photos of their stolen goods online. It’s become an organized industry.
Why This Got So Bad So Fast
A few things happened at once. During the pandemic, fraud of all kinds spiked, and criminals figured out that mailboxes were basically unguarded treasure chests. At the same time, in 2020, the Postal Inspection Service told its own Postal Police Officers that they could no longer patrol streets and neighborhoods — they had to stay on post office property only. That meant about 350 officers who used to stake out mailboxes and catch thieves in the act were pulled back to guarding buildings instead.
A retired postal police officer who patrolled high-crime areas in Newark, Manhattan, and Florida for 29 years put it bluntly: “So long as we’re there, we’re going to deter crime. Now, the criminals have no fear.”
Meanwhile, everyone got better at spotting phishing emails and enabling two-factor authentication on their phones. So criminals pivoted right back to the oldest trick in the book: stealing paper mail. Why hack a computer when you can just open a mailbox?
Stop Writing Checks (Seriously, If You Can)
The single best thing you can do is stop putting checks in the mail. Period. Most bills can be paid through your bank’s online bill pay, through the company’s website, or through apps like Venmo, Zelle, or PayPal. If your bank offers ACH automatic payments or e-checks, use those instead.
Sending money to a relative for their birthday? A Visa gift card from Walmart ($10 to $500, with a small activation fee) is a much safer option than mailing a personal check. Or just use a payment app.
I know some of you are thinking, “But I HAVE to write checks.” Maybe your landlord only takes checks. Maybe you’re paying a contractor. Fair enough — keep reading.
If You Must Write a Check, Use the Right Pen
This is one of those tips that sounds almost too simple, but it matters a lot. Use a gel ink pen — not a ballpoint pen. Gel ink soaks into the paper fibers rather than sitting on top of them, which makes it extremely difficult to wash off with chemicals. A standard ballpoint pen? That ink lifts right off with a little acetone.
Good options: the Uni-Ball 207 (about $8 for a 4-pack at Walmart or Target) or the Pilot G2 gel pen (around $6 for a 5-pack). Both use gel ink in black, which is what experts recommend. Black indelible ink is the gold standard. Keep a couple in your junk drawer specifically for check-writing.
Also: fill out every single line on the check completely. Don’t leave blank space after the payee name or the dollar amount. Draw a horizontal line through any remaining space so nobody can add extra digits or a different name.
Never Leave Outgoing Mail in Your Mailbox
That little red flag on your mailbox? It’s basically a neon sign that says “steal from me.” When you put outgoing mail in your curbside box and flip up the flag, you’re announcing to every person who drives by that there’s something in there worth taking. Mail thieves cruise neighborhoods late at night and early in the morning looking for exactly that signal.
Instead, take outgoing mail directly to the post office and hand it to someone at the counter, or drop it in the slot inside the building. If you absolutely have to use a blue collection box on the street, do it right before the last scheduled pickup time (it’s printed on the box). Don’t drop a check in there at 7 PM if the last pickup was at 4 PM — that envelope is going to sit there overnight, completely exposed.
Protect Your Incoming Mail Too
If you’re expecting checks — tax refunds, rebates, payments from clients — don’t let them sit in your mailbox all day. Grab your mail as soon as it’s delivered. If you work during the day and can’t get to it, consider a few options.
A locking mailbox is a smart investment. You can get a decent one at Home Depot or Lowe’s for $50 to $150. The mail carrier drops mail in through a slot, but you need a key to open the box and retrieve it. Not foolproof against someone with power tools and five minutes, but it stops the casual grab-and-go thief cold.
A P.O. box at your local post office is another option. Rates vary by location and box size — expect $20 to $40 for a small box for six months. Thefts from P.O. boxes are extremely rare.
Also, sign up for USPS Informed Delivery. It’s free. You get an email every morning with scanned images of the mail that’s coming to your address that day. If something shows up in the preview but never arrives in your box, you’ll know right away that it was stolen. You can sign up at informeddelivery.usps.com in about two minutes.
Check Your Bank Account Like It’s Your Job
Most victims don’t realize they’ve been hit until weeks later when they notice money missing or checks bouncing. By then, the trail is cold. Log into your bank account at least a couple times a week and look at the check images for any checks that have cleared. If the payee name looks different, the amount is wrong, or you see a check number you don’t recognize, call your bank immediately.
If your bank offers “Positive Pay” — a service that matches deposited checks against a list of checks you’ve actually written — ask about it. Some banks charge a small fee for this, but it’s one of the most effective ways to catch forged or altered checks before the money leaves your account.
A Few More Quick Fixes
Trim any bushes or hedges around your mailbox. Thieves love cover — if your mailbox is hidden behind a big shrub, they can take their time rifling through your mail without neighbors noticing. Keep the area around your mailbox visible from the street and from your windows.
Switch to eStatements from your bank so fewer documents with your account information are floating through the mail system. And never — ever — write your Social Security number or driver’s license number on a check. Some older billers used to request this. Don’t do it. There’s no good reason for it, and it just gives a thief more ammunition.
Going on vacation? Use the USPS Hold Mail service (free for up to 30 days) so your mail doesn’t pile up in an unattended box for a week.
If you think your mail has been stolen or a check has been washed, contact your bank right away, then report it to the Postal Inspection Service at uspis.gov/report or by calling 877-876-2455. File a police report too. The more reports that get filed, the more resources get directed at the problem.
Look, nobody wants to think about this stuff. But a $6 gel pen and a five-minute change to your routine could save you from months of dealing with a drained bank account and fraudulent charges in your name. The criminals have figured out that mailboxes are easy targets. Don’t make yours one of them.
