How Presold Works

Presold has two core features. Here's how each one works behind the scenes.

🛒 Preorders

When you enable preorder for a product:

What happens	Details
✅ Button changes	"Add to cart" becomes your custom preorder button
✅ Shopify setting updated	"Continue selling when out of stock" is enabled automatically
✅ Product tagged	A `_presold` tag is added (used for badge detection)
✅ Metafield written	Preorder config is stored on the product for the storefront

When a customer places a preorder:

What happens	Details
✅ Normal Shopify checkout	Full price, standard payment
✅ Order tagged	Your custom tag (e.g., "preorder") is added to the order
✅ Fulfillment hold	Optionally placed to prevent accidental shipping
✅ Analytics tracked	The preorder event is logged in your Presold dashboard

When a product is completely sold out (all variants unavailable):

What happens	Details
✅ "Notify me" button appears	Replaces the sold-out state on the product page
✅ Customer enters email	Saved to your waitlist in the Presold database
✅ You restock the product	Presold detects inventory change via webhook
✅ Emails sent automatically	All subscribers are notified with a link to buy
✅ Subscriber marked as notified	They won't receive duplicate emails

💡 Tip: BIS notifications are sent automatically — you don't need to do anything manually. Just restock the product in Shopify.

When a customer has both preorder and in-stock items in their cart:

✅ A popup warning appears at checkout
✅ Explains that the entire order may be delayed
✅ Customer can choose to continue or go back

❌ The popup does NOT block the order — it's informational only.