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Last reviewed: August 2026
Quick answer: Is it safe to mail a check? Generally yes, but the real fix isn’t a better pen. It’s not writing, sealing, and mailing the check yourself at all. Check washing, a stolen check that gets chemically altered before it’s deposited, is what actually puts a self-mailed check at risk, and the U.S. Postal Inspection Service reports postal inspectors recover more than $1 billion in counterfeit checks and money orders every year. With OnlineCheckWriter.com, you create the check on screen and we print, seal, and mail it the same business day, so it never sits in your mailbox or outgoing pile waiting for a thief to find it. See how that works, or keep reading for what to do if you’re still writing and mailing checks by hand.
Key Takeaways
What Is Check Washing?
Check washing is when someone steals a check out of the mail, then uses chemicals to remove the original ink, mainly the payee name and dollar amount, and rewrites the check to pay themselves instead. According to the U.S. Postal Inspection Service, “check washing scams involve changing the payee names and often the dollar amounts on checks and fraudulently depositing them.” The stolen check itself typically comes from a mailbox or a collection box, which is one reason the mailing step gets so much attention in fraud-prevention advice.
This isn’t a rare, one-off scam. A separate analysis by the Treasury Department’s Financial Crimes Enforcement Network (FinCEN) found banks reported $688 million in suspicious activity tied to mail theft-related check fraud in just a six-month window in 2023. FinCEN also broke down what happens after a check is stolen: 44% get altered and redeposited, 26% become templates for a counterfeit check, and 20% get forged with a new signature.
The Simplest Fix: Create and Mail the Check Online
Everything in the section below (gel pens, mailbox timing, filling every field) helps if you’re going to write, seal, and drop off a check yourself. But the fastest way to cut the risk is to skip those steps. With OnlineCheckWriter.com, you never touch a pen, an envelope, a stamp, or a mailbox:
- Log in from your computer or phone and create the check on screen: payee, amount, memo. No paper check stock on your end.
- Choose to mail it instead of printing it yourself.
- OnlineCheckWriter.com prints the check on secure check stock, seals it, and mails it through USPS or FedEx the same business day, ahead of the day’s cutoff. Standard USPS mailing runs $1.25 per check, including postage and paper; an overnight FedEx option is available for checks that need to arrive faster.
- Track it. A searchable payment log shows the mailing status and history for every check you send this way.
Because the check is never in your hands, it’s also never sitting in your outgoing mail pile or your mailbox overnight, the two places most check-washing cases actually start. A mailing service doesn’t erase every mail risk; a piece of mail can still be mishandled after it leaves any sender’s hands. But it does remove the part of the process you’d otherwise be responsible for.
Does the Type of Check You’re Mailing Change the Risk?
Most advice about mailing checks treats every check the same. It shouldn’t. What’s actually at stake, and how hard it is to get your money back if something goes wrong, depends on what you’re sending, whether you write it yourself or send it online.
| Check Type | What Changes |
|---|---|
| Payroll check | A predictable amount makes it an easy rewrite target. If one is stolen, getting a reissue moving fast usually depends on your payroll provider’s fraud policy as much as your bank’s. |
| Rent or mortgage check | A washed rent check can be redeposited for a much larger amount before anyone notices, since landlords and lenders don’t always flag an unusual amount for weeks. Log the amount and mail date, and check that the cleared amount matches. |
| Vendor or contractor payment | Business checks tend to run larger, which makes them both a bigger single loss and a more useful template for a counterfeit run, exactly the “26% become templates” pattern FinCEN found. |
| Cashier’s check or money order | Closest to cash. You can’t stop payment on it the way you can on an ordinary personal check (that right belongs to the drawer of a check under UCC 4-403), so recovery after theft is usually much harder. Use certified mail with tracking, or a same-day mailing service, for anything in this category. |
Still Writing and Mailing It Yourself? 6 Ways to Lower the Risk
If you’re still going to write the check by hand and mail it yourself, these habits meaningfully lower the risk. They just don’t remove it the way skipping pen and envelope does.
- Drop the envelope inside your local post office, or in a blue collection box right before its last scheduled pickup of the day, rather than earlier.
- Never leave outgoing or incoming mail sitting in your mailbox overnight.
- If you’ll be away, ask the post office to hold your mail, or have a neighbor collect it, instead of letting it sit.
- Don’t raise the red flag on your home mailbox for an outgoing check. It’s a visible signal that there’s something worth taking inside; use a collection box or the post office counter instead.
- Use a black or dark blue gel pen instead of a standard ballpoint. Gel ink is pigment-based, so it soaks into the paper fibers instead of sitting on top, which reduces, but doesn’t eliminate, how easily a thief can lift it chemically.
- Fill every line completely, leaving no blank space in the payee or amount fields where extra digits or names could be added.
The first three habits are the U.S. Postal Inspection Service’s own recommendations for reducing check washing and mail theft risk. The last three (skipping the mailbox flag, using gel ink, and filling every field) are standard precautions commonly recommended by banks and consumer-protection resources, not USPIS-specific guidance. Filling every field is more than tidy habit, too: under UCC Article 3, a bank can shift some of the loss for an altered check back onto the person who wrote it if blank space made the alteration easy.
What Should You Do If a Mailed Check Is Stolen or Altered?
Report it right away. File with the Postal Inspection Service, your local police department, and your credit reporting bureau. Then contact your bank the moment you notice a check cleared for the wrong amount or the wrong payee.
Federal banking law doesn’t give you unlimited time to catch it. Under UCC 4-406, you generally have up to one year from your bank statement date to report an altered or forged check; after that, the bank typically isn’t liable no matter how careful you were. If the same wrongdoer alters more than one of your checks, that window can shrink to just 30 days for the second and later items. Two habits make the deadline easy to hit: keep a simple log of checks you’ve sent (amount, payee, date mailed), and turn on your bank’s text or email alerts for cleared checks instead of waiting for the monthly statement. Either one can turn weeks of exposure into a day or two.
Skip the Pen, Envelope, and Mailbox
Create the check on screen and let OnlineCheckWriter.com print, seal, and mail it the same business day through USPS or FedEx.
Frequently Asked Questions
Is it safe to send a check by mail?
Mailing a check yourself is generally safe, but the risk comes from check washing while the check sits in your mailbox or outgoing pile. Creating the check online and having OnlineCheckWriter.com print, seal, and mail it removes that window entirely, you never handle the check yourself.
What is check washing?
Check washing is when a thief steals a mailed check and uses chemicals to remove the ink, then rewrites the payee name and amount before depositing it.
Do I need a pen, envelope, or stamp to mail a check through OnlineCheckWriter.com?
No. You create the check on screen with the payee, amount, and memo. OnlineCheckWriter.com prints it on secure check stock, seals it, and mails it through USPS or FedEx the same business day. You never touch paper, pen, or a mailbox.
Does mailing a check expose my bank account and routing number?
Yes, both are printed in plain text on every check, mailed or handed over in person. That’s normal and doesn’t let someone withdraw money on its own, but it’s one more reason to limit how long a check sits somewhere it could be copied or photographed, not just stolen outright.
Should I raise the flag on my mailbox when I have an outgoing check?
No. A raised flag tells anyone walking by that there’s mail worth taking. Drop the check at a blue collection box or your local post office instead of flagging it for pickup from home.
What kind of pen should I use to write a check I’m mailing?
A black or dark blue gel pen. Gel ink is pigment-based, so it’s harder to lift chemically than standard dye-based ballpoint ink. It reduces the risk, it doesn’t eliminate it, which is why filling every field still matters.
Does mailing a check through a service cost more than doing it myself?
Through OnlineCheckWriter.com, standard mailing runs $1.25 per check, including postage and paper, compare that against buying your own checks, envelopes, and stamps, plus the trip to mail them yourself.
What should I do if I think a check I mailed was stolen?
File a report with the Postal Inspection Service and your local police, then contact your bank right away. Banks generally require altered-check reports within a year of the statement date under UCC 4-406, sooner if it’s a repeat forgery.
Can I track a check after it’s mailed?
OnlineCheckWriter.com keeps a searchable payment log, so you can look up the mailing status and history for checks sent through the platform.
Is it riskier to mail a cashier’s check or money order than a personal check?
Generally yes. A cashier’s check or money order is closer to cash: you don’t have the stop-payment right you have on an ordinary personal check, so if it’s stolen, getting the money back is usually harder. For a high-value item, certified mail with tracking or a same-day mailing service is worth the extra step.
Is a mailed check safer than an eCheck?
They carry different risks. A mailed check can be intercepted in transit, while OnlineCheckWriter.com’s eCheck feature sends a check digitally and skips the physical mail step entirely. Which one fits depends on whether the recipient can accept an eCheck instead of a mailed paper check.
A mailed check is not inherently risky, but every extra hand it passes through, including your own, is a chance for something to go wrong. The six habits above help if you’re writing and mailing checks yourself. Skipping that step entirely, by creating the check online and letting OnlineCheckWriter.com print, seal, and mail it, removes the biggest window: your own mailbox and outgoing mail pile.
Start mailing checks through OnlineCheckWriter.com, see how to send a check by mail step by step, or compare mailing a check yourself against a mailing service in common check-by-mail problems and how to fix them.
OnlineCheckWriter.com – powered by Zil Money, is a financial technology company, not a bank. Banking and money movement services are provided through partner financial institutions and licensed service providers. FDIC insurance coverage applies only to eligible deposit products and accounts, and is subject to applicable terms, conditions, limitations, and requirements. Additional information regarding partner institutions, products, and services is available in the applicable terms and agreements.