SYNTHETIC PROOF WALKTHROUGH

Block reliance on supplied certificate metadata after expiry

A synthetic expiry-window check over customer-provided certificate metadata and verification status.

See the three stepsRead the product contract →
NO KEY · NO UPLOAD · NO CUSTOMER DATAThis demonstration runs entirely in your browser using the visible synthetic fixture below.

THREE STEPS

Put the control before the consequential action.

The customer-supplied insurance certificate expired before the supplied as-of date.

  1. 01

    Supply certificate metadata

    The customer provides its reference, type, expiry date, and whether its own reviewer verified the evidence.

  2. 02

    Apply the supplied date window

    The control compares each expiry date with the as-of date and warning window.

  3. 03

    Stop expired evidence

    Expired metadata produces BLOCKED and identifies the affected customer reference.

VISIBLE SYNTHETIC CONTRACT

Inspect exactly what the workflow sees.

The input and output are representative of the named product contract. Copy them into an architecture note, test fixture, or internal review—never treat this browser-only demonstration as a live control result.

Customer-authorized input
{
  "vendor_reference": "northstar-1007",
  "as_of_date": "2026-08-10",
  "warning_days": 30,
  "certificates": [
    {
      "certificate_reference": "COI-2026",
      "certificate_type": "Insurance",
      "expires_on": "2026-07-31",
      "verified_by_customer": true
    }
  ]
}
Agent-readable output
{
  "status": "COMPLETED",
  "decision": "BLOCKED",
  "exceptions": [
    {
      "code": "CERTIFICATE_EXPIRED",
      "severity": "CRITICAL",
      "message": "A supplied certificate is expired.",
      "evidence": {
        "certificate_reference": "COI-2026",
        "expires_on": "2026-07-31"
      }
    }
  ],
  "evidence": {
    "vendor_reference": "northstar-1007",
    "warning_days": 30
  },
  "next_action": "Do not rely on this certificate until the customer verifies current coverage."
}

WHAT THIS PROVES

Evidence for a stop point—not permission to act.

Certificate Expiry Check does not authenticate a document, verify coverage, contact an insurer, determine legal sufficiency, or replace customer review.

Decision
BLOCKED
Named exception
CERTIFICATE_EXPIRED
Evidence
certificate referenceCOI-2026expires on2026-07-31
Next action
Do not rely on this certificate until the customer verifies current coverage.

KEEP BUILDING

Move from the synthetic fixture to the exact API contract.

Review the product inputs, outputs, errors, and safety boundary before using authorized data. The related implementation guide explains the design decisions behind the control.

Product contract →Implementation guide →Security posture →

Try the control through the supported buyer path.

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