Bag tag

Lore & Background

The first known separable coupon ticket for baggage appeared in the late 19th century, though the specific inventor and patent date are not reliably recorded. It showed the issuing station, destination, and a consecutive number; the lower half went to the passenger, while the upper half was attached to baggage via a brass sleeve and strap. Reinforced paper tags were later introduced to reduce detachment during transport.

The Warsaw Convention of 1929 established rules for baggage checks and set liability limits, but Article Four specifically dealt with passenger tickets, not baggage checks. Prior to the 1990s, airline bag tags were paper attached with string, containing airline name, flight number, tag number, and destination code; these were easy to replicate and offered little security.

Current bag tags use Interleaved 2 of 5 bar codes, RFID, or electronic paper for tracking and sorting.

Reader's Guide

Bag tags have evolved from simple paper coupons to sophisticated electronic devices, reflecting the growing complexity of global air travel. The 1882 patent by John Michael Lyons established the basic concept of a separable tag for passenger and baggage. The Warsaw Convention of 1929 formalized the baggage check's legal role, setting liability limits that still underpin carrier responsibility. The shift to bar-coded tags in the 1990s enabled automated sorting, but low read rates (as low as 85%) led to innovations like RFID and electronic paper tags, which offer higher reliability and passenger convenience. The license plate system, adopted by IATA in 1987, standardized baggage reconciliation after the Air India Flight 182 bombing, linking each tag to passenger and flight data. Today, bag tags remain essential for security, sorting, and tracing, with ongoing efforts to improve read rates and reduce operational costs.

Did You Know?

• The first separable coupon ticket was patented by John Michael Lyons on June 5, 1882.
• The Warsaw Convention of 1929, Article Four, established criteria for issuing baggage checks.
• Current bar code bag tags use Interleaved 2 of 5 symbology and can have read rates as low as 85%.
• In the European Union, bag tags with green edges allow passengers to use a separate 'Blue Channel' at customs.

Origins and Early Standards

The story of the baggage tag begins in 1882, when John Michael Lyons of Moncton, New Brunswick, secured a patent for what he called a separable coupon ticket. His design displayed the issuing station, the destination, and a sequential reference number. The ticket split into two halves: the lower portion went to the passenger, while the upper half, punched with a hole at its top, slid into a brass sleeve and was lashed to the luggage with a strap. Over time, reinforced paper tags entered service, engineered to resist the tugs and jolts of transit better than their predecessors. A major regulatory milestone arrived in 1929 with the Warsaw Convention, whose Article Four set out the formal criteria for issuing a baggage check and, crucially, capped the carrier's financial liability for lost or damaged checked baggage. These early frameworks laid the groundwork for every tag system that followed, establishing the dual purpose of the tag as both a routing tool for the carrier and a claim document for the traveler.

The Barcode Revolution and Reading Challenges

Before the 1990s, airline bag tags were simple paper slips tied to luggage with a string, carrying the carrier name, flight number, a tag number built from a two-letter airline code plus six digits, and the destination airport code. These proved vulnerable to counterfeiting and offered minimal security. The modern era brought bar codes printed in the Interleaved 2 of 5 symbology onto adhesive thermal paper, applied at check-in so that automated systems could sort bags without human intervention. Reading these codes happens two ways: hand-held scanners or in-line arrays embedded in the conveyor belt. In-line arrays fire a 360-degree ring of lasers or cameras to catch the tag from any angle as bags tumble and shift. A persistent weakness is that arrays mounted beneath the belt gap collect dust and debris, dragging successful read rates down to roughly 85 percent, meaning more than one in ten bags must be pulled aside for manual scanning, adding labor and delay. Camera-based systems, with their software algorithms, push read rates toward 99.5 percent under ideal conditions, outperforming their laser predecessors.

RFID and the Rise of Electronic Tags

Frustrated by the fragility of printed bar codes, where crumpled, scored, or poorly rendered tags simply cannot be scanned, airlines and technology firms have turned to radio-frequency identification chips embedded directly in the tag. Harry Reid International Airport in the United States and Hong Kong International Airport have both rolled out full RFID tracking systems, while the International Air Transport Association is working toward a global RFID tag standard. In 2013, British Airways trialed re-usable electronic tags powered by electronic paper; passengers checked in via a smartphone app and tapped the phone to the tag, transmitting flight details and a barcode over NFC. Fast Travel Global's eTag took a similar electronic-paper approach but used Bluetooth Low Energy and was not tied to a single carrier. Qantas launched its Q Bag Tags in 2011, though the absence of a scannable barcode limited them to domestic Australian routes. The concept truly broke into mainstream service in March 2016, when Rimowa partnered with Lufthansa to launch the first successful electronic tag product, followed by Lufthansa's BAGTAG in January 2018, the first fully secure, RFID-integrated tag that fits any suitcase.

The Passenger Stub and Practical Functions

Beyond routing bags through a carrier's sorting network, the tag serves several practical roles for the traveler. The passenger stub, handed directly to the traveler or tucked into the ticket envelope, helps a passenger spot their own suitcase on a crowded baggage carousel where dozens of similar bags appear. At a handful of airports it still functions as proof that the person collecting the bag is its rightful owner, deterring someone from walking off with another passenger's luggage. If a bag goes missing and fails to appear at the destination, the stub and its tag number give both the passenger and the carrier a traceable reference to locate it. Carrier liability for lost or damaged checked baggage is governed by published tariffs and international agreements, a limitation rooted in the Warsaw Convention. In the European Union, bag tags for intra-EU flights carry distinctive green edges, signaling to customs that the bag may pass through a separate Blue or Green Channel, streamlining the arrival process for passengers who have nothing to declare.

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