What Are Security Barcode Labels?
A security barcode label combines a machine-readable barcode with a substrate or adhesive that is deliberately difficult to remove or replicate without leaving visible evidence. Unlike an ordinary paper label — which can be peeled off cleanly and restuck elsewhere — a security label is designed to self-destruct, leave a residue, or reveal a hidden message the moment someone tries to tamper with it.
The barcode itself (Code 128, QR Code, Data Matrix, or a retail EAN) works the same way as on any other label. What sets security labels apart is the material and adhesive underneath it. These labels are used wherever proof of origin, proof of integrity, or theft deterrence matters: electronics warranties, pharmaceutical packaging, asset tracking, high-value retail, and government records.
Types of Security Barcode Labels
Tamper-Evident Labels
Tamper-evident labels use a brittle facestock or a specially formulated adhesive that fractures or leaves a residue if removed. The label cannot be peeled off in one piece — it tears into fragments, making tampering immediately visible to anyone who inspects the item. They are the most common security label for electronics and warranty seals.
Void Labels
Void labels contain a hidden layer that transfers the word "VOID" — or a pattern — onto the surface beneath when the label is lifted. Even if the label is put back in place, the word remains on the substrate, providing clear evidence of opening. Void labels are popular for sealing envelopes, software boxes, and equipment enclosures.
Destructible Labels
Made from an ultra-thin vinyl or polyester facestock, destructible labels shatter into tiny pieces when removal is attempted. They are impossible to peel off intact and are commonly used for asset tagging on metal surfaces, government property, and laboratory equipment where the label must remain permanently attached.
Holographic Labels
Holographic labels embed a diffractive optical element that shifts color and pattern when viewed from different angles. They are extremely difficult to reproduce without specialist equipment, making them effective for brand authentication and anti-counterfeiting on high-value goods and official documents.
Ultra-Destructible Labels
A step beyond standard destructible labels, ultra-destructible labels use a facestock so fragile that any attempt at removal leaves only microscopic fragments. They are used in pharmaceutical seals, customs enforcement, and high-security asset environments where even partial label recovery must be prevented.
Security Label Types at a Glance
| Label Type | Key Feature | Typical Use Cases | Price Range |
|---|---|---|---|
| Tamper-Evident | Tears or leaves residue on removal | Electronics warranty seals, retail anti-theft | $0.05 – $0.20 / label |
| Void | Leaves "VOID" pattern on substrate | Software packaging, equipment enclosures | $0.06 – $0.25 / label |
| Destructible | Shatters into fragments on removal | Asset tagging on metal, government property | $0.08 – $0.30 / label |
| Holographic | Optically variable, hard to replicate | Anti-counterfeiting, brand authentication | $0.15 – $0.60 / label |
| Ultra-Destructible | Disintegrates completely on removal | Pharmaceuticals, customs, high-security assets | $0.20 – $0.80 / label |
Prices vary by order volume, print complexity, and supplier. The ranges above are general benchmarks — request quotes from specialist label converters for accurate pricing on your run size.
Common Use Cases
Asset Management
Organizations tracking laptops, projectors, medical devices, or other valuable equipment use destructible or tamper-evident labels with a unique asset ID barcode. If a label is missing or damaged when an item is audited, staff know immediately that something has changed.
Retail Theft Deterrence
High-value retail products — cosmetics, electronics, accessories — are often sealed with tamper-evident labels at the factory or distribution center. A broken seal at the point of sale signals that the package has been opened, protecting both the retailer and the end customer.
Pharmaceutical and Medical
Regulatory requirements in many markets mandate tamper-evidence on drug packaging. Ultra-destructible or void labels on bottle caps and blister packs help pharmacies and patients verify that a product has not been adulterated in transit.
Electronics Warranty Seals
Manufacturers place void or tamper-evident labels over screws, battery compartments, and access panels. Opening the device breaks the seal, voiding the warranty — and making it clear to service technicians that the unit has been opened before.
Logistics and Supply Chain
Cartons, pallets, and secure envelopes in high-value supply chains use tamper-evident seals with scannable barcodes to track chain-of-custody. Each scan event is timestamped, and a broken seal triggers an investigation.
Which Barcode Format to Use
The barcode format on a security label follows the same logic as any other label — the choice depends on what you need to encode and how much space you have.
- Code 128 — the standard choice for asset tracking. Encodes alphanumeric IDs of any length (e.g., "ASSET-2026-00342") compactly and scans reliably on curved or small surfaces.
- QR Code — best when you need to store a URL, a full product description, or multiple data fields in a single symbol. A QR Code on a holographic label can link directly to an authentication page.
- Data Matrix — ideal for very small labels (under 10mm × 10mm) where a linear barcode would be too wide. Common in pharmaceutical and electronics applications where label real estate is tight.
- EAN-13 / UPC-A — required for retail-channel products that go through point-of-sale scanning. If your security label is also the retail barcode, use the appropriate GS1 format for your market.
For most asset tracking and warranty seal applications, Code 128 is the practical default — it handles variable-length alphanumeric data, requires no registration, and is readable by virtually every barcode scanner on the market.
How to Generate Security Barcodes in Bulk
Security label material must come from a specialist label converter (they stock the tamper-evident and void substrates), but the barcode data itself — the unique IDs, asset numbers, or serial numbers — is something you can generate in seconds from a spreadsheet. Here is the workflow:
Build your asset or serial number list in CSV or Excel
Create one row per label. Include columns for the barcode value (asset ID, serial number, or SKU) and any human-readable text you want printed below the barcode. A 500-row spreadsheet takes about two minutes to prepare.
Upload the file and select your barcode format
Drag and drop your CSV or Excel file into Bulk Barcode Generator. Choose Code 128 for asset IDs, QR Code for URL-linked authentication labels, or Data Matrix for miniature pharmaceutical labels. No row limit applies.
Download print-ready PNG or PDF files
Export individual high-resolution PNGs (one per barcode) or a multi-up PDF. All processing happens in your browser — your asset list never leaves your device. Download a ZIP of all PNGs or a paginated PDF for direct handoff to your label printer.
Send the barcode artwork to a security label converter
Supply your downloaded files to a specialist security label printer. They will apply your barcode artwork to tamper-evident, void, destructible, or holographic stock and ship finished labels ready to apply. Most converters accept PDF or high-resolution PNG artwork.
Generate the barcode data for your security labels in seconds — upload your asset list, pick Code 128 or QR Code, and download print-ready files. Free, no signup required.
Generate Security Barcodes Free →FAQ
Can I print security labels at home?
You can print the barcode artwork at home on standard label paper, but that is not a security label — it is just a regular sticker with a barcode on it. True security labels (tamper-evident, void, destructible, holographic) require specialist facestock and adhesives that are only available from label converters. The practical approach is to generate your barcode data for free, then send the artwork files to a security label supplier for production.
What is the difference between tamper-evident and void labels?
A tamper-evident label shows that it has been disturbed by tearing apart or leaving adhesive residue — the label itself is visibly damaged. A void label goes a step further: when peeled, it leaves the word "VOID" or a pattern printed on the surface beneath, even if the label itself is put back in place. Void labels are harder to conceal evidence of tampering because the mark is left on the item, not just on the label.
Do I need special software to generate security barcodes?
No. The barcode format used on security labels (Code 128, QR, Data Matrix) is identical to any other barcode — there is nothing proprietary about the symbol itself. You can generate all the barcode artwork you need using a free browser-based tool like Bulk Barcode Generator — upload your spreadsheet, choose the format, and download. The security properties come from the label material, not from any special encoding in the barcode.