A Known Shipper is a business that has been vetted and validated under the TSA’s air cargo security program, and is therefore permitted to tender cargo that can be carried on passenger aircraft. Cargo from a shipper without that status cannot fly in the belly of a passenger plane — it must move on all-cargo aircraft or go through additional screening.
For Miami shippers using MIA, one of the largest international air freight gateways in the United States, the distinction directly affects available flights, transit time and rate.
Known Shipper versus Unknown Shipper
The TSA maintains a Known Shipper Management System. Indirect air carriers — freight forwarders holding TSA security programs — and direct air carriers submit shipper information into it. Once validated, the shipper appears as Known.
- Known Shipper cargo may be tendered for passenger aircraft, subject to applicable screening.
- Unknown Shipper cargo is restricted to all-cargo aircraft. That narrows your routing options substantially, because passenger belly capacity is a large share of international lift out of MIA.
The status attaches to a specific business at a specific physical location. A company with three warehouses does not automatically have Known status at all three.
How validation works
Validation is performed by your IAC or air carrier, not applied for directly with TSA by the shipper. Typically it involves:
- Submission of legal business name, physical address, and contact details.
- Verification of the business through commercial data sources.
- A physical site visit to confirm the location exists, is a legitimate commercial facility, and has reasonable cargo security.
- Entry into the Known Shipper Management System and periodic revalidation.
Common reasons validation fails: a residential or virtual-office address, a mismatch between the legal entity name and the address on file, or no accessible commercial cargo area at the site.
Screening still applies
Known Shipper status is not a screening exemption. Cargo destined for passenger aircraft must be screened at piece level, either by the carrier, by a qualified Certified Cargo Screening Facility, or by the shipper if they hold CCSF status themselves. Known Shipper status governs whether you may tender the cargo at all; screening governs how it is cleared.
Certified Cargo Screening Facility
A CCSF is a facility approved to screen cargo before it reaches the airport. Shippers and forwarders with heavy air volume often pursue CCSF status so that freight arrives at the carrier pre-screened, which removes a bottleneck at the airline’s acceptance cut-off. A TSA-approved bonded carrier operating under a security program can move that screened cargo to the airline without breaking the chain of custody.
What this means for hazmat air freight
Dangerous goods add a second, independent compliance layer. Known Shipper status addresses security; IATA Dangerous Goods Regulations address safety. Both must be satisfied, and passenger aircraft carry tighter DG quantity limits than cargo aircraft do — which is why some hazmat consignments end up on all-cargo services regardless of shipper status. If you are tendering dangerous goods by air out of Miami, review the packing, marking and declaration requirements in our guide to shipping hazmat by air, and note that lithium battery rules are among the most frequently updated.
Practical steps for Miami shippers
- Ask your forwarder to confirm your Known Shipper status and the exact address on file.
- Add every shipping location you use — a new warehouse needs its own validation.
- Keep the legal entity name consistent across your commercial registration, your invoices and the KSMS record.
- Notify your IAC before you move facilities, not after.
- If air volume is significant, evaluate whether CCSF status at your own dock is worth the compliance overhead.
Go Freight is a TSA-approved bonded carrier operating a bonded 104,000 sq ft Miami warehouse and handles airport recovery and delivery to MIA through its hazmat and air cargo services.
Frequently asked questions
How do I become a TSA Known Shipper?
You do not apply directly to TSA. Your freight forwarder or air carrier submits your business details into the Known Shipper Management System and arranges a site visit to verify the physical location and its cargo security. Status is then subject to periodic revalidation.
Can unknown shipper cargo fly at all?
Yes, but only on all-cargo aircraft. It cannot be carried in the belly of a passenger aircraft, which removes a large share of international lift out of Miami and usually means longer transit times and fewer routing options.
Does Known Shipper status mean my cargo skips screening?
No. Known Shipper status determines whether you may tender cargo for passenger aircraft. Screening is a separate requirement and still applies at piece level, performed by the carrier, by a Certified Cargo Screening Facility, or by the shipper if they hold CCSF status.
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Go Freight is an asset-based Miami 3PL founded in 2004, running 100+ owned trucks, our own chassis pool, and a 104,000 sq ft bonded warehouse at 6901 NW 26 Ave, Miami, FL 33147. Request a rate or call (786) 445-0150.