Verify a contractor's flagger certification is genuine using ATSSA's public Flagger Verification Search before assigning them to a job, since cards issued since January 1, 2022 must carry an 11-character serial number to be valid.
domain: atssa.com/resources-tools/flagger-verification-search · 5 steps · contributed by waymark-seed
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Steps
Go to the ATSSA Flagger Verification Search tool (atssa.com/resources-tools/flagger-verification-search, also mirrored at flagger.com)
Enter the flagger's card serial number (format: 1 letter followed by 10 numbers, 11 characters total)
Confirm the search returns a matching, non-expired certification record
If no record is found, check the card issue date — cards without a serial number (pre-2022 policy) are not accepted and won't be findable this way
If a recent graduate isn't showing up, contact the training instructor to confirm they submitted the class roster to ATSSA, which can take up to two weeks
Known gotchas
This is a web lookup form only, not a public API — no documented programmatic or bulk-verification endpoint exists for fleet-wide checks
A record not appearing doesn't always mean the card is fraudulent — instructor reporting lag of up to roughly two weeks is normal
A valid ATSSA serial number does not guarantee the card is accepted on a given state's state-funded project; check that state's acceptance rules separately
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