Why cyber insurance claims get denied — and how attestations really work

The most expensive sentence in cyber insurance is signed months before any incident: "The undersigned attests that the statements above are true and accurate." Most owners sign it the way they sign a rental-car agreement. Underwriters read it the way a claims adjuster will — later, with your authentication logs on the table.

Understanding how claims actually get denied is the best argument for doing the readiness work honestly. Here are the four ways it goes wrong.

1. The application said something untrue

The big one. You checked "MFA enforced on all email accounts"; the intrusion came through a mailbox that didn't have it. During a claim, forensics establishes how the attacker got in — and if the entry point contradicts an attested answer, the carrier has grounds to dispute, reduce, or rescind.

The uncomfortable part: most misrepresentation isn't lying, it's optimism. The owner believed MFA was on everywhere. The IT provider enabled it "for most accounts" in 2024. Nobody checked the service mailbox. The fix is procedural, not moral: every application answer gets verified against evidence before signing — a screenshot, an export, a dated note. That's the entire purpose of a pre-signature attestation checklist.

2. An attested control quietly lapsed

Policies increasingly carry language about maintaining the controls you attested to. The EDR trial expired. The backup job failed silently in March. The offboarding checklist stopped being used when the office manager left. If the lapse is connected to the loss, you're in dispute territory even though the application was true on the day you signed it.

Controls you attest to are commitments for the policy year. The boring machinery — a monthly fifteen-minute control check against your own attestation sheet — is what keeps them true.

3. Notice came late, or through the wrong people

Cyber policies require prompt notice, and most carriers maintain approved panels of forensics firms and breach counsel. The failure pattern is human: the team spends four days heroically rebuilding, then calls the carrier — after wiping the evidence, hiring a friend's IT firm at $300/hour, and making statements to customers that counsel would have stopped.

Call the hotline early — before you're sure it's serious. That's what it's for, the carrier's incident teams are genuinely good at this, and early notice protects coverage rather than signaling weakness.

4. An exclusion applied

Every policy carves things out — commonly some funds-transfer-fraud scenarios unless specific verification controls are in place, acts-of-war language, or exclusions written around disclosed weaknesses (that end-of-life server you told them about). Exclusions aren't tricks; they're the deal. But you need to know the deal: the time to ask your broker "so what exactly isn't covered?" is before binding, not during a claim. Given that business email compromise and funds-transfer fraud drive 58% of incidents (Coalition, 2026), the FTF terms deserve particular attention — including whether the carrier requires a documented payment-verification procedure for full coverage.

The honest-answer doctrine

All four failure modes share a prevention strategy, and it's the one we build everything around: make every answer honestly "yes," or disclose accurately. Close the gap before applying when you can — most of these controls take days, not months. When you can't, disclose with compensating controls; underwriters price disclosed risk all the time, and disclosure can't be used against you the way a false "yes" can.

That's also why we're allergic to anything that coaches application-question gamesmanship. An application you shaded is a policy you can't rely on — the worst of both worlds: premiums and uncovered losses.

The free Readiness Check shows you which answers you could honestly give today, and the Readiness Pack's attestation checklist walks every application answer against its evidence before you sign.