> For the complete documentation index, see [llms.txt](https://docs.nosto.com/shopify/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nosto.com/shopify/post-purchase-upsell/requirements.md).
# Requirements
### Nosto Setup
* [Nosto must be installed](/shopify/installing.md) and active.
* [Tracking & Session management](/shopify/tracking-and-session-management.md) must be in place
* Product catalog must be synced.
* Post Purchase Upsell module must be active.
### Shopify Setup
* Nosto must be selected as "Post-purchase page" app in Shopify Checkout Settings
Nosto must be selected as "Post-purchase page" app in Shopify Checkout Settings
### Main Currency Only
Shopify does not support post-purchase upsell in secondary currencies via Shopify Markets. Offers will only be shown if the purchase was made in the store’s main currency.
## Limitations to Be Aware Of
Some scenarios may block the upsell page from showing. Common causes include:
* Unsupported Payment Provider
* Order paid fully with a gift card
* Use of unsupported Payment Methods
* Only works for stores **default currency**
{% hint style="info" %}
Please make sure, to align Post Purchase Upsell with your fulfillment rules, and ensure it follows Shopifys order status.
{% endhint %}
## **For more, refer to**
\[[Requirements and Shopify Limitations](https://help.nosto.com/en/articles/11530627-requirements-and-shopify-limitations)]\
\[[Handling Partially Paid Post Purchase Orders](https://help.nosto.com/en/articles/11533532-handling-partially-paid-post-purchase-orders)]
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