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22 records on file · 18 fault codes cited · last filed 04 NOV 2026

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SYM-012

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GA4 purchase event fires twice: how to find the second sender and fix it

SYMPTOM FILE · filed 04 NOV 2026

A GA4 purchase fires twice because two things send it for one order. On a website, GA4 drops a repeat with the same transaction_id, so the copies that reach your reports carry no ID or a different one. Find every sender with one test order, keep one, and send the order number as transaction_id.

F-101F-102F-104 OPEN THE FILE →

{
  "ref": "SYM-012",
  "type": "symptom",
  "title": "GA4 purchase event fires twice: how to find the second sender and fix it",
  "fault_codes": [
    "F-101",
    "F-102",
    "F-104"
  ],
  "filed": "2026-11-04",
  "canonical": "https://synctag.co.uk/notes/ga4-purchase-event-fires-twice"
}

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SYM-012 GA4 purchase event fires twice: how to find the second sender and fix it “My purchase event fires twice in GA4, how do I fix it” F-101F-102F-104 VRD-001 “You don't need server-side tracking” IT DEPENDS F-401F-204 SYM-013 Google Ads conversion value doesn't match actual revenue: reconcile it step by step “reconcile Google Ads conversion value with Shopify sales” F-302F-104F-101F-301F-403 SYM-014 Google Ads offline conversions not importing: what the upload errors mean “Google Ads offline conversions not importing” F-204F-402F-104 REC-01 Reconciliation No. 01 — what moved this period 12 MAY — 11 JUN 2026 R-501F-102F-204F-402 SYM-015 GTM tag fires before the dataLayer is ready: how to prove it and fix the trigger “GTM tag fires before the dataLayer is ready” F-103F-301F-601

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22 records shown