{
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  "generated_at_utc": "2026-10-16T12:55:40.483Z",
  "record_id": "VXI-EXT-PROCUREMENT-EVENTGRID-RETRY-01-v1",
  "record_kind": "external_reference",
  "title": "Event Grid: Order, bounded retries and dead letters",
  "system": "Azure Event Grid",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does Event Grid guarantee ordered delivery until a subscriber succeeds?",
  "near_questions": [
    "Can Event Grid events arrive out of order?",
    "Can duplicate deliveries still occur?",
    "Which errors are not retried?",
    "Does either retry limit stop delivery?",
    "Is dead-lettering enabled?",
    "Can the service reach dead-letter storage?",
    "Does a late acknowledgement remove every retry?",
    "How does the consumer recognize stale events?",
    "Who replays failed deliveries?",
    "Does endpoint acknowledgement prove business completion?",
    "What supports a supplier recovery claim?",
    "Can I save the Event Grid delivery boundary?"
  ],
  "supported_claims": [
    {
      "claim": "Event Grid attempts at-least-once delivery without guaranteeing event order. Retry behaviour depends on error type and configured limits; some failures are not retried. Events can be dropped when limits are reached or no dead-letter destination exists. Consumers need evidence of ordering and recovery appropriate to their workflow.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
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  "related_record_ids": [],
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    "source_type": "official_external_documentation",
    "source_title": "Azure Event Grid delivery and retry",
    "source_url": "https://learn.microsoft.com/en-us/azure/event-grid/delivery-and-retry",
    "checked_on": "2026-10-16",
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  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "Event Grid attempts at-least-once delivery without guaranteeing event order. Retry behaviour depends on error type and configured limits; some failures are not retried. Events can be dropped when limits are reached or no dead-letter destination exists. Consumers need evidence of ordering and recovery appropriate to their workflow.",
    "required_buyer_context": "Endpoint type, subscription limits, dead-letter destination and consumer state handling. Effective configuration and dated operational evidence have not been inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
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  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
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    "claim_to_check": "Event Grid guarantees ordered, indefinitely retried processing.",
    "documented_statement": {
      "status": "documented",
      "statement": "Event Grid attempts at-least-once delivery without guaranteeing event order. Retry behaviour depends on error type and configured limits; some failures are not retried. Events can be dropped when limits are reached or no dead-letter destination exists. Consumers need evidence of ordering and recovery appropriate to their workflow.",
      "source_ids": [
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    "buyer_evidence_required": [
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    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not infer ordered business processing from durable event delivery."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "eventgrid",
        "url": "https://learn.microsoft.com/en-us/azure/event-grid/delivery-and-retry",
        "final_url": "https://learn.microsoft.com/en-us/azure/event-grid/delivery-and-retry",
        "title": "Azure Event Grid delivery and retry",
        "checked_on": "2026-10-16",
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        "bytes": 70865
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Preserve the delivery limitations used to assess an event-driven supplier integration.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Endpoint type, subscription limits, dead-letter destination and consumer state handling."
    }
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#event-grid-order-retry-deadletter-boundary",
  "machine_readable_record": "/varexis-index/records/event-grid-order-retry-deadletter-boundary.json"
}