Shopify sends 2 "purchase" events to Google Ads resulting in incorrect item sold number. How to fix?

[zane0113]

Hi there,

We just identified an issue that Google Analytics 4 and Google Ads captured incorrect item sold number (normally doubled our "Items purchased" qty). After raising a case to Google Ads and Google Analytics Community, we found that it's because Shopify sends 2 "purchase" events to Google Analytics / Ads, it's not an individual issue but it's a bit challenging to fix.

Please see the case in details with screenshots here:

https://support.google.com/analytics/thread/276135334/why-my-ga4-captured-incorrect-item-sold-number... 

May I ask is there any better resolution? We are very struggling with this issue at the moment.

Thank you very much!

Zane

[Dev-Brad]

Hey Zane ( @zane0113 ), 
when adding the GA4 code to your theme did you add it through the app and custom code? How was this initially set up? Also might be worth checking if you're using GTM to run any scripts etc

Let me know if you need any further help