Asset Tags: Types, Materials, Numbering and Placement

An asset tag is a durable label fixed to a piece of equipment that carries a unique ID, usually as a QR code or barcode, so the item can be matched to its record of what it is, where it is and who has it.

That one ID is the whole point. Everything else on the tag supports it. This guide covers what a tag must carry, which type and material to buy, how to number tags so the scheme survives growth, where to put them on common equipment, and what government property tags require. It ends with mistakes we see when teams start tagging, and a short FAQ.

Two related guides go deeper on narrower questions:

• Asset tags for laptops and computers: firmware asset tags, Chromebooks, and 1:1 school programs.
• QR code asset tags: what to encode, error correction, size, and what happens when someone scans.

For the short definition, see the asset tagging glossary entry.

What an asset tag must carry

A working tag needs four things. Most tags that fail are missing one of them.

1. A unique ID in machine-readable form. A QR code, a 1D barcode, a Data Matrix code or an RFID chip. This is what the scanner reads.
2. The same ID as printed text. Put it under or next to the code. When the code is scratched, or the scanner is flat, someone can still type the number.
3. The owner. The organization's name. For items that leave the building, add a return line: "If found, return to" plus a phone number or address.
4. Only things that never change. A tag outlives the person who holds the item, the room it sits in, and often the department that bought it. Those details belong in the record, not on the label.

Useful extras: a logo, a colour band per site or department, and a tamper-evident layer for items that walk.

What you leave off matters as much. A tag is public. Anyone in the room can read it. Do not print people's names, prices, passwords or network details on it.

Asset tag types compared

You make two separate choices: what the tag is made of, and which code it carries. They are independent. The same QR code can sit on paper, polyester or aluminium.

By material

These lifespans are relative, not guarantees. The real figure depends on the adhesive, the surface and how often the item is handled. Ask the supplier which adhesive suits your surface (painted metal, textured plastic, powder coat), then test a handful of tags before you order a thousand.

By code

RFID has two catches. Standard passive tags are detuned by metal, so metal assets need tags designed for on-metal mounting. And readers are a project of their own. Shelf does not read RFID tags. If bulk RFID counts are a hard requirement, Shelf is not the right tool for that part of the job.

For most teams that track equipment people use, a QR code on laminated polyester is the sensible default. Move to aluminium where the environment demands it, and to tamper-evident film where theft is the problem.

Choosing a material by environment

Pick the material for the worst day the item has, not the average one.

Two details matter as much as the face material.

• Adhesive. Low-energy plastics, textured finishes and powder coat need stronger adhesives than smooth metal or glass.
• Finish. A glossy laminate can throw glare under bright light, which slows phone scanning. A matte finish avoids it.

How to number asset tags

An asset tag numbering system has one job: give every item an ID that is unique, never reused, and easy to read aloud. A good asset tag format also tells you a little about the item at a glance, without encoding anything that will change.

A format that works: PREFIX-SITE-YEAR-SEQUENCE

Put together: LT-NY-26-0042. More examples:

• CAM-LA-25-0007: camera body, Los Angeles, received 2025, number 7
• TRI-LA-25-0031: tripod, same site
• PT-DEN-26-0118: power tool, Denver, received 2026
• VEH-HQ-24-0003: vehicle, head office, received 2024

Why include site and year? Two sites can each run their own sequence without colliding. And an auditor can see roughly how old an item is without a lookup.

Keep it short. Some systems limit length. Dell's firmware asset tag field, for example, takes at most 10 characters and no spaces, which is why the laptop guide drops the hyphens when it writes the ID to firmware.

If a simpler scheme fits, use it. One site with a few hundred items can run LT-0042. Uniqueness is the rule that matters.

Add a check digit if people type the numbers

A check digit is one extra digit calculated from the others. If someone mistypes a digit, the check fails and the system can reject the entry. The Luhn algorithm (mod 10), the scheme used on payment card numbers, catches every single-digit error and almost every swap of two adjacent digits.

Example: the digits in LT-NY-26-0042 are 260042. Their Luhn check digit is 7, so the tag reads LT-NY-26-0042-7.

Skip the check digit if every lookup is a scan. QR codes carry their own error correction, so the check digit only protects the printed copy that people read and type.

What never to encode in an asset tag number

• Names. People leave and items get reassigned. A name on a label is also personal data on public display.
• Prices or cost centres. A visible price tells a thief which items are worth taking.
• Rooms or departments. They change. Track the current location in the record.
• The serial number. You already have it. Copying it makes the tag longer for no gain.
• Status or condition. "Spare" or "loaner" is true today and wrong next year.

One more habit: if your IDs mix letters and digits, leave out O and I. They are easy to misread as 0 and 1.

Numbering in Shelf

Shelf gives every asset a sequential ID automatically: SAM-0001, SAM-0002 and so on. A number is never reused, so a deleted asset's number is retired with it. The SAM prefix is fixed. To keep your own format, add it as a text custom field. All of these IDs are searchable, so a damaged label never means a lost record. See asset identifiers in Shelf for details.

Where to put an asset tag

The rule is the same for every asset class. Put the tag where you can scan it in daily use without moving or opening the item. Keep it away from spots that hands, cases and straps rub. Never cover the manufacturer's serial number, safety label or regulatory marking.

Three more rules:

• Tag the item, not the container. A tag on a case says nothing about what is inside. Tag the case and each item in it.
• Clean before you stick. Wipe the spot with isopropyl alcohol and let it dry. Skin oil and dust are the most common reasons adhesive tags fall off.
• Avoid tight curves. Small codes on a curved surface, such as a tripod leg or a cable, read poorly. Use a flag label that wraps and sticks to itself.

We will add photos of each placement to this guide. The laptop guide also covers desktops, monitors, docks and Chromebooks.

Government and federal property tags

Government property tags follow the same logic as any asset tag. The difference is that the rules say what the record behind the tag must hold. Three examples show the pattern. They are not legal advice: check the clause in your contract or your agency's own manual.

US federal contractors holding government property. The FAR Government Property clause (52.245-1, September 2021) requires the contractor's property records to include the name, part number and description; quantity received, issued and on hand; unit acquisition cost; a unique-item identifier or equivalent, if available and needed for individual tracking; unit of measure; the accountable contract number; location; disposition; posting reference and date; and the date placed in service where the contract requires it. The tag carries the ID. The record carries the rest.

US Department of Defense items. DFARS 252.211-7003 (January 2023) requires unique item identification for delivered items whose government unit acquisition cost is $5,000 or more, with listed exceptions. The marking follows MIL-STD-130, and the identifier is encoded in a Data Matrix ECC 200 symbol (ISO/IEC 16022). A QR code tag does not meet this requirement.

State agencies. Oregon's accounting manual (policy 10.50.00.PR) treats assets of $5,000 or more with a useful life beyond one year as capital assets. It says they should be tagged with a State of Oregon identification tag and property control number, and physically inventoried at least annually. It also tells agencies to track high-risk items below that threshold, naming laptops, firearms and hand tools as examples, on a separate inventory listing.

What this means for property tags on equipment:

• Use a durable material. Property tags usually stay on an item for its whole service life. Anodised aluminium or tamper-evident polyester are common choices.
• State the owner clearly on the tag.
• Keep the tag number and the record number identical. One ID, everywhere.
• Tag high-risk items below your capitalization threshold too. These are the fixed asset tags that matter most in an audit, because small portable items are the ones that go missing.
• Plan for the annual count. A scannable tag turns a walk-through inventory into a scan list. See fixed asset tracking for how that works in practice.

A note on Shelf here: Shelf generates QR codes, and with the Alternative Barcodes add-on on the Team plan it can store Data Matrix, Code 128, Code 39 and EAN-13 values on an asset. Shelf is not an IUID registry tool and does not report to the Department of Defense.

Buying tags or printing your own

You have three routes. Many teams use two of them.

1. Print your own. The free Shelf asset label designer makes QR asset labels in 25, 40 and 60 mm sizes and exports PNG, SVG and PDF. No signup needed. Print the PDF on label sheets, or the PNG or SVG on a label printer. Your stock sets the durability: buy polyester stock for anything that moves. Inside Shelf, every asset gets a QR code automatically, and you can print labels in batches.
2. Order pre-printed tags. The Shelf store sells pre-printed QR asset tags. They arrive unclaimed. You scan one, then link it to a new or an existing asset in your workspace.
3. Keep the labels you have. If your equipment already carries barcodes, the Alternative Barcodes add-on on the Team plan lets you attach those codes to assets instead of re-tagging.

We are testing label printers for a separate guide. It will cover which printers and label stock produce QR labels that scan reliably.

Shelf's Free plan is for a single user and includes unlimited assets, QR scanning and custody, which is enough to tag your equipment and see who holds what. Bookings and multiple users are on the Team plan. The free Shelf Companion app on iPhone and Android scans tags in the field. If you are choosing an asset tag system and the software behind it, start with asset tracking in Shelf.

Mistakes we see when teams start tagging

These come up again and again when teams set up asset management tags for the first time.

1. Tagging before the register exists. Tags go on, records come later, and numbers drift apart. Create or import the records first, or use pre-printed tags you link as you scan.
2. Paper labels on equipment that travels. They wear out fast on a laptop, a camera or a tool. Use polyester.
3. Tagging the removable part. Batteries, lens caps, lids, cases and docks move between items. Tag the body.
4. Covering the serial number. You lose the warranty lookup and sometimes the legal marking.
5. Two sites, two sequences, one number. Without a site code, LT-0042 exists twice.
6. No printed number under the code. When the code is damaged, nobody can look the item up.
7. Codes too small for the scan distance. A tiny code on a camera body is fine at arm's length. On a vehicle or a rack, size up.
8. Names on tags. They go stale and expose personal data.
9. Retired items keep their tags. When an item is disposed of, update the record and remove or deface the tag, so a stray scan never brings it back.
10. Nobody owns the process. Decide who tags new items on arrival, and make tagging part of receiving.

Frequently Asked Questions

What is an asset tag?

An asset tag is a durable label fixed to a piece of equipment that carries a unique ID, usually as a QR code or barcode, plus the same ID in printed text. Scanning or reading the ID matches the item to its record of what it is, where it is and who has it.

What should an asset tag include?

A unique ID as a scannable code, the same ID as printed text, and the owner's name. For items that leave the building, add a return line with a phone number. Leave off names, prices, passwords and anything that changes, such as the room or the department.

What is the best material for asset tags?

Laminated polyester for most indoor equipment: offices, schools and AV gear. Anodised aluminium for outdoor equipment, vehicles, tools and kitchens, where heat, sunlight and chemicals destroy printed labels. Tamper-evident film for theft-prone items. Paper only for temporary labels.

How do I number asset tags?

Use a fixed format such as PREFIX-SITE-YEAR-SEQUENCE, for example LT-NY-26-0042: asset class, receiving site, year received, and a zero-padded running number that is never reused. Add a Luhn check digit if people type the numbers by hand. Never encode names, prices, rooms or the serial number.

Where do I put an asset tag?

Where you can scan it in daily use without moving or opening the item, away from spots that get rubbed, and never over the serial or safety label. On a laptop, the underside near the front edge. On a camera, outside the tripod plate footprint. On a tripod, the top leg section. On a power tool, the motor housing, not the battery. On a chair, under the seat. On a vehicle, inside the driver's door frame.

Sources

All checked on 5 October 2026.

• Acquisition.gov, FAR 52.245-1 Government Property (paragraph (f)(1)(iii), records of government property)
• Acquisition.gov, DFARS 252.211-7003 Item Unique Identification and Valuation ($5,000 threshold, MIL-STD-130, Data Matrix ECC 200)
• Oregon Department of Administrative Services, Oregon Accounting Manual 10.50.00.PR, Capital Assets (tagging, annual inventory, high-risk items)
• DENSO WAVE, QR Code error correction feature
• Wikipedia, Luhn algorithm (errors detected)
• atlasRFIDstore, Metal mount RFID tags (metal detunes passive tags not designed for it)
• Dell, Using Dell Command | Configure to set the asset tag information (10-character, no-spaces limit)
• Shelf, Asset identifiers: QR ID, SAM ID and your own reference numbers
• Shelf, Alternative barcodes
• Shelf, What to do after purchasing asset tags