A watermark on a check is a faint image pressed into the paper itself while the paper is being made, visible only when you hold the check up to a light. Because the design is part of the paper’s fiber structure rather than something printed on top, it is difficult to fake with ordinary equipment, which makes it one of the quickest ways to test whether a check in your hand is genuine.
Most watermarks sit on the back of the check, though some appear on the front. The design usually repeats the check manufacturer’s logo, the issuing bank’s name, or a standardized security symbol. Under normal room light, you should barely see it. Held up to a lamp or window, it should glow softly from inside the paper and look the same from either side.
How to Check a Watermark Yourself
You need a strong, focused light source. A desk lamp or a bright window works. Hold the check between your eyes and the light and look for a soft, translucent image that appears to live inside the paper rather than sit on the surface. If the image looks like a printed graphic, that is a red flag.
Next, tilt the check to about a 45-degree angle and watch the surface. An artificial watermark, made with transparent ink or a chemical coating applied after the paper dries, often produces a faint sheen or glossy patch when the light catches it, because the coating sits on top of the fibers. A real watermark will not change in reflectivity as you tilt it.
Run a fingertip across the watermark area. The paper should feel uniform. A raised edge, a sticky spot, or a film over the image points to something applied to the surface after the fact. Then flip the check. A true watermark shows through from both sides and looks the same either way. A surface-applied mark often shows on only one side, or looks noticeably different from the back.
True Versus Artificial Watermarks
The physical difference is worth understanding, because it explains why the tests above work. True watermarks are made during papermaking: a textured roller presses a design into the wet pulp so certain areas end up with thinner fibers. Those thin areas pass more light, which is what your eye picks up when you hold the paper to a lamp. The mark cannot be rubbed off, washed away, or peeled from the sheet, because it is the sheet.
Artificial watermarks are added later, with transparent inks or coatings that change the paper’s opacity in targeted spots. They can look convincing at a glance, and you may see them on checks printed by smaller third-party services that use generic security paper. The tilt test and the both-sides test are what separate the two.
Other Security Features to Check at the Same Time
A watermark is one layer. A counterfeit check will usually fail several tests, not just one, so it is worth running through the others while the check is in your hand.
Microprinting
Microprinted text is made up of characters less than one-hundredth of an inch tall. To the naked eye, it looks like a thin solid line or a dashed border, often along the signature line. Under a magnifier, actual words become readable.1Check Payment Systems Association. Guideline for Use of the Enhanced Check Security Features Padlock Icon Consumer photocopiers and printers cannot resolve text that small, so on a counterfeit the line usually turns blurry, broken, or empty. A small “MP” symbol near the signature line signals that microprinting is present.
Void Pantograph
A void pantograph is a pattern hidden in the check’s background. You should not see anything unusual on the original. Run the check through a copier or scanner, though, and the word “VOID” (or a similar warning) appears across the copy. If you are handed a check that already reads VOID in the background, you are holding a photocopy, not an original.
Chemical-Sensitive Paper
Many checks are printed on paper that reacts to solvents. If someone tries to erase the payee name or dollar amount with bleach, acetone, or a similar chemical, the paper stains, discolors, or causes the surrounding ink to run.2EUIPO. Reactive Inks The marks are permanent. This is the main defense against “check washing,” where stolen checks are chemically altered before being cashed. If the check you received shows patchy discoloration around the payee or amount fields, treat it as tampered.
The Padlock Icon
A small padlock symbol on the front of a check certifies that the check meets a minimum standard of three distinct security features aimed at deterring counterfeiting and alteration.1Check Payment Systems Association. Guideline for Use of the Enhanced Check Security Features Padlock Icon The icon itself, together with the description on the back of the check, counts as one feature, so at least two others must also be built in. The padlock is a registered certification mark administered by the Check Payment Systems Association.
Ultraviolet Features
A small handheld UV flashlight lets you check a layer that isn’t visible in ordinary light. U.S. Treasury checks contain UV-sensitive printing that glows under blacklight: four lines of text flanked by official seals become visible, and the printing cannot be photocopied.3U.S. Department of the Treasury. U.S. Treasury Check Security Features Many commercial check printers embed UV-reactive fibers or inks as well. If a check that should show something under UV shows nothing, or if the UV pattern looks blotchy, that is worth taking seriously.
A Note on Mobile Deposit
None of these physical checks work through a phone camera. A photo captures a flat image and cannot show you paper thickness, watermark depth, UV response, or the reactive properties of the paper. If a check feels off, take it into a branch instead of depositing it remotely.
Available Funds Are Not the Same as a Cleared Check
This is the trap most fake-check victims fall into. Federal rules require your bank to release deposited funds on a set timetable: generally by the second business day for local checks and the fifth business day for nonlocal checks.4eCFR. 12 CFR 229.12 Availability Schedule Those deadlines govern when you can withdraw the money. They do not mean the bank has confirmed the check is real.
A counterfeit check can take weeks to be identified and returned. If your bank flags a check as suspicious, it can place an extended exception hold of up to 7 business days for local checks or 11 business days for nonlocal checks.5Government Accountability Office. Financial Institutions – Time Limits on Holding Deposits Generally Met but More Oversight Needed Even after those windows close, the check can still come back as fraudulent. When it does, your bank reverses the deposit and you owe the full amount, whether or not you have already spent it or forwarded it to someone else.
That is exactly what fake-check scams count on. The Federal Trade Commission tracks several recurring versions:6Federal Trade Commission. How To Spot, Avoid, and Report Fake Check Scams
- Overpayment. A buyer sends a check for more than the agreed price and asks you to refund the difference.
- Mystery shopping. A “employer” tells you to deposit a check and use the funds to buy gift cards or wire money as a test.
- Prize winnings. A check arrives with a letter saying you have won a sweepstakes, but you need to prepay taxes or fees.
- Personal assistant work. A job posting asks you to deposit checks and forward the money.
- Car wrap advertising. A company sends a check and instructs you to forward part of it to a supposed decal installer.
The pattern is always the same: urgency, and pressure to move money out before the check has a chance to bounce.
If a Check Looks Fake
If a check fails any of the checks above (missing or surface-only watermark, blurred microprinting, no UV response, discoloration around the payee or amount, a design that rubs off), stop before you deposit it.
- Do not deposit it. Once it hits your account, you are on the hook if it turns out to be fraudulent.
- Call the issuing bank using the number listed on that bank’s official website, not the number printed on the suspect check, and ask them to verify the check.
- If you have already deposited it, tell your own bank right away so they can place a hold and investigate.
- Report it to the FTC at ReportFraud.ftc.gov, which feeds the Consumer Sentinel database used by law enforcement.7Federal Trade Commission. ReportFraud.ftc.gov
- File a local police report. The paper trail helps if you later need to dispute charges or show you acted promptly.
What You Owe If You Deposit a Counterfeit
If a counterfeit check clears provisionally and later gets returned, your bank reverses the deposit and looks to you, as the depositor, for the full amount. Money you already spent or sent along to someone else does not change that.
There is also a clock on catching problems with your own account. Under UCC Section 4-406, once you receive your bank statement you have a reasonable period, and no more than 30 days, to review it and notify the bank of any unauthorized or altered items. If the same forger keeps hitting your account and you missed that window, you lose the right to claim those later losses. After one year, you lose the right to dispute any unauthorized signature or alteration at all, regardless of whether you or the bank were careful.8Cornell Law School. UCC 4-406 Customer Duty to Discover and Report Unauthorized Signature or Alteration Read your statements when they arrive, and treat any unfamiliar check as urgent.