> For the complete documentation index, see [llms.txt](https://docs.twoowls.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.twoowls.io/getting-started/important-checklists/advertiser-checklist/verify-sending-domains.md).
# Verify sending domains
{% hint style="info" %}
🦄**Protecting your data:** Verifying sending domain is a way for Facebook to know that you have permission to send conversion data from the site to the pixel. \
\
If they don't have this, imagine how everyone would be able to **send malicious data** to your pixel, messing up your pixel altogether!
{% endhint %}
Let's follow **8 simple steps** to verify your domain!
{% hint style="info" %}
📝**Preparation:** \
**- Shopify side:** You need to have access to the header section of your Shopify theme, or have contact with people that do.\
\&#xNAN;**- Facebook side:** Your account needs to be assigned with the Admin permission to be able to verify a domain
{% endhint %}
## Copy the meta verification tag from Facebook
### Paste the verification tag to the head section of your theme
### Confirm verification
{% hint style="info" %}
**CAPI events for IOS 14.5 opted-out users:** Two Owls Conversion API **track 100% of sales**, but for Facebook to be able to use that data for ad targeting or optimization, you need to ensure that the events are **listed in the 8 prioritized conversion event list**!
{% endhint %}
{% content-ref url="/pages/YrgkFoYZPboyD5CA1QJW" %}
[Set up Aggregated Event Measurement](/getting-started/important-checklists/advertiser-checklist/set-up-aggregated-event-measurement.md)
{% endcontent-ref %}
---
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