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Facebook Pixel Purchase event firing more than once with Shopify. Any help?

1 0 0

Hello! So I recently just installed a new pixel through the Shopify site (online store > preferences > pixel > setup > create). I started running ads and it's showing more purchases than the actual recorded on Shopify.


Any help on this? Hope someone can assist as this have been the case for quite some time already.



Replies 4 (4)
242 6 23

@iammau may i look at your shop? sometimes it happens but would you please tell me from how long you re facing this issue?

4 0 0

I believe that I am also having the same issue. 


Shopify Partner
243 4 29

Hi @iammau,


Facebook duplicate conversions is a known issue that makes it hard for you to really measure your advertising performance and ROAS accurately. It can happen due to various reasons, customers that refreshed the checkout page, clicked and/or viewed more than one ad in the attribution window and the list goes on...

We developed on AdScale a report that helps you to eliminate the double conversions by connecting the conversion ID directly to the Shopify Order ID, and this can detect duplicate conversions on Facebook  & Instagram, or even cross-platfrom between Facebook & Google. This way you can get the real picture of your advertising performance!





AdScale is the best way to advertise on Facebook & Google because we use the power of your store data (that they don’t have) to run highly targeted ads and get an average ROAS of 10X.
Shopify Partner
440 45 118

Hi @iammau ,

This is common and there is the reason: 

it's because of the attribution model. Right now, FB uses the default attribution window 1-day after view and 7-day after click. This means that e.g. if a person clicks on an ad in one of the Facebook placements, is redirected your website, checks the product but doesn't finish the purchase after this click but comes back within the following 7 days, Facebook will attributes the purchase to the ad which the person clicked on. 

Plus, the analytics on FB (and of course also GA) has some limitations, so the best is always to check the real number of orders in your Shopify store - this is the most trustworthy source!

Hope it helped! 

Send me a link to your store to and I'll help you out.
For more info what I do, visit my agency website or my personal website