Redirects & Embeds in Checkout/Thank You Page Extensions

Hi all,

I’m working on a Shopify setup where customers must complete a form hosted on an external platform after checkout in order to finalize their order. Due to strict data security requirements, we cannot use Shopify’s built-in form functionality or store sensitive inputs in Shopify itself.

Right now our thank-you page just has a simple button linking to the form, but we really need a solution where the user flow is smooth. Ideally, the customer is auto-redirected to the form immediately after purchase, or the form is embedded directly on the thank-you/checkout success page.

My main question: Is this possible with a custom app?
My initial assumption was that a custom app could inject a script into the thank-you page, but it seems like this feature has been deprecated. If this is true, then I assume there are no apps on the app store that would provide this functionality either, correct?

If anyone has implemented something similar or discovered a clever work around, I’d love to know. Any input is appreciated.

Thanks in advance!

Hi @Metagrate_Developers

It looks like this is an intentional limitation. A custom app cannot inject scripts into the thank‑you / order status page, and you cannot auto‑redirect customers off the thank‑you page to an external site.

Any public app in the App Store is subject to the same restrictions, so they also cannot do this.

You can wrap a button with a link component, which allows you to allow the customer to open this post-purchase form.

This doesn’t force the customer to complete the action, but it does serve as a call to action.