Every feature on a high-security check is defending against one specific attack. Knowing which is which tells you what you're actually buying.
"High-security checks" is a marketing phrase covering a stack of unrelated defenses. They are not redundant — each one blocks a different fraud method, and a check missing one is wide open to that specific attack regardless of how many others it has.
Here is what each feature does, and what it stops.
Before the features, the threats. Nearly every check-security feature exists to defeat one of these:
A true watermark (also called a Fourdrinier or true-foundry watermark) is embedded in the paper fibers during manufacturing, not printed on top. It becomes visible when held up to the light at an angle, and cannot be duplicated or removed without destroying the paper.
Its real strength is that it's impossible to photocopy — copiers and scanners work with reflected light, and the watermark only exists in transmitted light. Counterfeiters who try to print a fake watermark generally fail, because printed ink can't reproduce the transparency variation of a real one.
This is a feature you verify by picking the check up. If your team never holds checks to the light, the watermark is doing nothing for you.
Microprinting is a line of extremely small type — often placed under the top border or in the signature line — that reads as a solid or dashed line at normal size. Under magnification, actual characters, words, or phrases resolve.
The defense works on the resolution limit of copiers and scanners: reproduce the check and the microprint distorts into a blur or a plain line, which is a clear signal of tampering. It's a passive tell that survives on the copy itself.
A void pantograph is a warning message hidden inside a printed background pattern. On the original it's invisible or unobtrusive; run the check through a photocopier or color copier and a "VOID" message appears on the copy.
Unlike microprinting, which requires someone to notice the degradation, a void pantograph announces itself. Vendor documentation describes it as effective protection specifically against color copier fraud.
This is the defense against the attack that targets checks you legitimately wrote. A protective chemical coating on the check reacts to bleach, solvents, and hypochlorites — the chemicals used to wash ink off a check — by revealing "VOID" or by speckling and staining the paper.
Check washing is the fraud that hits businesses hardest, because the fraudster starts with a genuine, correctly-signed check pulled from the mail. Counterfeit defenses don't help here: the check is real. Only alteration detection catches it.
A hologram that is hot-stamped rather than printed shifts appearance with viewing angle and cannot be photocopied — a copier captures one fixed reflection, which reproduces as a flat gray smear. The "hot-stamped, not printed" distinction is the whole point; a printed image of a hologram copies just fine.
Heat-reactive (thermochromic) ink fades or changes color when touched or breathed on, then returns. It's the fastest authentication test available — no light source, no magnifier, no equipment. Press a thumb on it and watch. A photocopy or counterfeit does nothing.
| Feature | Primarily stops | How you verify it |
|---|---|---|
| True watermark | Copying, counterfeiting | Hold to light at an angle |
| Microprinting | Copying | Magnifier — check for distortion |
| Void pantograph | Copying (esp. color copiers) | "VOID" appears on the copy |
| Chemical protection | Check washing / alteration | Stains or reveals VOID if solvent-treated |
| Hot-stamped hologram | Counterfeiting, copying | Tilt — image should shift |
| Heat-reactive ink | Counterfeiting | Touch or breathe on it |
Notice what none of these protect against: a blank check taken from your own stock. Every feature above authenticates the check as genuine. A thief holding a genuine blank from your binder passes all of them.
That's the argument for physical control of unused check stock — a binder that closes, ideally one with a zipper, stored somewhere controlled. Security features protect checks in transit. Nothing protects checks sitting loose in an unlocked drawer except not leaving them there.
Zipper closures, capacity, and where the binder actually lives are covered in our buying guide — including which binder formats are built to be secured rather than carried.
Read the Complete Buying Guide →Some check vendors, including Deluxe, offer optional fraud-screening or identity-restoration services (for example EZShield) alongside check orders. We're noting these exist because they came up in research — they are vendor-offered services, not something this site provides, endorses, or earns anything from. Evaluate them on their own terms.