Electronic cargo seals and container e-locks

An e-seal is a lock with a brain. Where a plain bolt seal only tells you, after the fact, that a door was opened, an electronic cargo seal combines the seal itself with a GPS receiver, a mobile SIM and a tamper sensor. It locks the container, reports its own position as it travels, and sends an alert the instant the seal is cut or the door is forced.

The terms e-seal, electronic seal, e-lock and container e-lock are used interchangeably in the trade — they all describe the same class of device. What matters is the job it does: continuous location plus immediate tamper evidence, on your own cargo, from the inland depot to the port and along the corridor.

Because the seal carries its own tracker, the record it leaves is more than a number written on a manifest. Every arm, every move and every tamper event is timestamped, so a consignment closes with an operational custody trail rather than a single seal reference.

An accredited customs ECTS seal exists to discharge a customs obligation on the revenue authority's behalf — revenue protection on bonded and transit cargo. Who is permitted to supply those seals, and when they are mandatory, is a customs-policy question, decided by regime and route. Trakora does not claim to supply accredited customs seals; for that, the right first call is TRA Customs and your clearing agent.

A commercial container e-lock — the e-seal on this page — is something a business fits to its own containers to see where they are, get tamper and door-open alerts, and hold a signed custody record. The two can sit on the same container at the same time: if a regulator mandates a customs seal, use theirs, and add your own e-lock if you also want independent tracking. They are complementary, not substitutes.

For the full breakdown of ECTS, RECTS, transit bonds and where a commercial e-lock fits alongside them, see the ECTS electronic cargo tracking explainer.