Measurement and attribution
An ecommerce purchase-tracking audit that starts with the order
Verify purchase events, unique transaction references, values, currencies, and checkout paths against store orders before trusting the totals.
A useful purchase-tracking audit begins with a completed store order and asks whether the measurement systems recorded the intended event accurately. A tag appearing on the site is a starting point; it does not prove that purchase reporting is correct.
Check the purchase record’s identity and value
Confirm that a purchase carries a stable transaction reference corresponding to the order. Check the value and currency against the store’s records using the same revenue definition. Review the handling of tax, shipping, discounts, and any other amounts included in the event.
Google’s GA4 guidance emphasizes unique transaction IDs for purchase deduplication. An absent, empty, or reused identifier deserves attention. Review the current documentation when implementing the event rather than relying on a remembered field list.
Test more than one checkout path
Where the store offers different payment methods, devices, or checkout flows, identify which paths need verification. A normal desktop order may not reveal a problem affecting a mobile payment flow or a redirect back from a provider.
Use an agreed test procedure so the team understands what is being checked and how any test order will be handled. Respect consent settings and avoid putting unnecessary personal customer information into analytics events.
Look for duplicate collection routes
An event may be implemented through a store integration, a tag manager, custom code, or a combination. Document the intended source of each purchase signal. Multiple systems installed over time can create confusing overlap even when each was individually configured with good intentions.
Do not remove a collection route simply because another exists. First establish which destination it serves, how it is deduplicated, and what would stop working if it disappeared.
Reconcile a sample after implementation
Compare a set of store orders with the collected events and investigate exceptions. Record what is verified, which limitations remain, and who owns ongoing checks. Revisit the audit after major checkout, platform, consent, or tracking changes.
EP4P connects campaign decisions with tracked sales, so measurement is part of the work rather than a one-time installation. An auditable purchase record supports both better optimization and a clearer explanation of which sales belong in the performance agreement.
Further reading: Google Analytics: transaction IDs and duplicate purchases.
Let our team handle the marketing.
You do not have to become the tracking department. EP4P connects purchase measurement, reporting, and the campaign decisions that depend on them.
We build, fund, and manage your campaigns. You pay an agreed percentage only on ecommerce sales directly tracked to clicks on our ads. Our work and the ad spend are included. No monthly retainer or setup fee.