Rebuy's Post-Purchase Shopify Flow integration lets merchants build automated workflows that respond to post-purchase offer events in real time. Use the Rebuy Post-Purchase Event trigger to automatically tag orders, segment customers, and power downstream automations

Post-Purchase orders that had an offer accepted will display a unique identifier in the order history in Shopify, indicating that the Post-Purchase offer was accepted during the checkout process.

(Screenshot above: Order showing a Post-Purchase offer accepted indicator)

Rebuy provides a dedicated Rebuy Post-Purchase Event trigger inside Shopify Flow that fires on post-purchase events. Merchants can use it to automatically tag orders, segment customers, and build downstream automations such as email flows, without any manual tagging.

The Rebuy Post-Purchase Event trigger is a Shopify Flow trigger that fires when a customer interacts with a Rebuy Post-Purchase offer. Merchants can attach conditions to these triggers to check which type of event occurred, then define an action such as adding an order tag.

The following variables are available when building conditions in Shopify Flow using the Rebuy Post-Purchase Event trigger.

(Screenshot above: Shopify Flow condition builder showing the rebuyEvent variable picker with all available variables listed: eventType, product, orderProductType, acceptedProductsCount, and rebuyFlowId)

The Post Purchase Rebuy Event eventType variable is the most commonly used variable in Rebuy post-purchase workflows. Use it to trigger different order tags or actions based on exactly what happened during a post-purchase offer, such as tagging accepted orders for fulfillment workflows, flagging declined offers for win-back email flows, identifying timed-out offers for follow-up campaigns, or tracking partial payment removals for order management.

You can check for any of the following event type values using the eventType variable:

The Post Purchase Rebuy Event orderProductType variable fires separately and reflects the product composition of the order after all post-purchase interactions are complete. Use it to segment orders based on whether customers accepted one-time products, subscriptions, or a mix of both, such as routing subscription orders into a different fulfillment flow, triggering different post-purchase email sequences based on product type, or tagging orders for subscription onboarding campaigns.

Its values are:

(Screenshot above: Shopify Flow condition builder showing rebuyEvent.orderProductType set to "Equal to" ONE_TIME_AND_SUBSCRIPTION)

The Post Purchase Rebuy Event product variable gives you access to details about the specific product included in a post-purchase offer. You can use these sub-fields to build more targeted conditions in your workflows, such as tagging orders based on a specific product name, filtering actions by whether the accepted product was a subscription, applying different tags based on variant title, or tracking the quantity and subtotal of accepted offer products.

(Screenshot above: Shopify Flow condition builder showing the rebuyEvent/product variable picker with all available sub-fields listed: name, shopifyProductId, variantTitle, quantity, subtotal, and isSubscription)

The Post Purchase Rebuy Event acceptedProductsCount variable reflects the total number of products a customer accepted across all post-purchase offers for an order. Use it to segment orders based on offer volume, such as tagging orders where multiple offers were accepted, triggering different fulfillment or email flows based on how many products were added, or building loyalty workflows that reward customers who accepted more than one offer.

(Screenshot above: Shopify Flow condition builder showing rebuyEvent.acceptedProductsCount set to "Equal to" 2 — enter your own amount)

The Post Purchase Rebuy Event rebuyFlowID variable corresponds to the ID of the specific Rebuy Post-Purchase Flow that triggered the event. Use it to build workflows that behave differently depending on which Post-Purchase Flow a customer interacted with, such as applying different order tags per flow, routing orders into separate fulfillment or email sequences based on the offer shown, or isolating tagging logic for specific campaigns like BFCM or seasonal promotions.

(Screenshot above: Shopify Flow condition builder showing rebuyEvent.rebuyFlowId set to "Equal to" — enter your own Post-Purchase Flow ID from Rebuy Admin)

To find your Post-Purchase Flow ID, navigate to your Rebuy Admin > Post Purchase > Post-Purchase Flows and copy the ID number listed in the ID column next to your flow.

(Screenshot above: Rebuy Admin Post-Purchase Flows tab showing the ID column with a flow ID highlighted)

Follow these steps to create a workflow in Shopify Flow that automatically tags orders based on Rebuy post-purchase events.

From your Shopify Admin, click Apps in the left sidebar, then select Flow.

Then click Create workflow in the top right corner.

(Screenshot above: Shopify Admin left sidebar with "Flow" highlighted under Apps, Shopify Flow Workflows page with "Create workflow" button visible.)

In the workflow editor, click Select a trigger and choose Rebuy

Personalization Engine.

Select the Rebuy Post Purchase Event from the trigger list. The trigger card will display: "Triggers on Rebuy post-purchase events including offer viewed, accepted, declined, and partial paid removal."

Click the + below the event trigger to add a Condition. The Condition checks for event types within the trigger

Set the condition variable to rebuyEvent (this is where different Rebuy event types will show)

Then set the rebuyEvent variable Equal to [your event type].

See section Available Variables in the Rebuy Post-Purchase Event Trigger for more info on the available Rebuy Post-Purchase Event trigger variables

Common values include: OFFER_VIEWED, OFFER_ACCEPTED, OFFER_DECLINED, PARTIAL_PAID_REMOVED, OFFER_TIMER_EXPIRED

You can also create multiple condition branches from the trigger to handle different scenarios. For example, one branch can check Rebuy event order product type exists AND Rebuy event accepted products count exists to tag orders based on product type and count, while a separate branch checks Rebuy event event type is equal to OFFER_ACCEPTED to tag orders where an offer was accepted.

(Screenshot above: Workflow editor showing the "Rebuy Post Purchase Event" trigger branching into two conditions: "Rebuy event order product type exists AND Rebuy event accepted products count exists" on the left, and "Rebuy event event type is equal to OFFER_ACCEPTED" on the right)

After setting your condition, click the True branch and add an Action.

Choose Shopify then select Add order tags.

Enter a tag name you want applied to the order (for example, ppo-accepted).

Click Turn on workflow to activate it.

Repeat this process to build separate workflows for each event type you want to track. You can also build multiple Condition cards with different actions in the same flow.

(Screenshot above: Workflow editor showing the full workflow — the left branch adds the tag ppo-class-{{rebuyEvent.orderProductType}}-count-{{rebuyEvent.acceptedProductsCount}} when order product type and accepted products count exist, and the right branch adds the tag ppo-accepted when event type is equal to OFFER_ACCEPTED)

Once your workflow is active, you can confirm it's working by viewing the order in Shopify. A successfully tagged order will show "Rebuy Personalization Engine edited this order" in the order timeline, and the tag you configured (for example, ppo-accepted) will appear in the Tags section of the order.

(Screenshot above: Shopify order timeline showing "Rebuy Personalization Engine edited this order" and the ppo-accepted tag applied to the order — confirming the Shopify Flow workflow tagged the order successfully after a post-purchase offer was accepted)

Shopify Flow workflows can be exported from one store and imported into another, making it easy to replicate your Rebuy post-purchase tagging setup across multiple stores.

To export a workflow:

Open the workflow in Shopify Flow, click the More actions menu, and select Export.

(Screenshot above: Shopify Flow workflow export option in the More actions menu)

To import a workflow:

From the Shopify Flow Workflows page, click Import and select the exported workflow file.

(Screenshot above: Shopify Flow Workflows page with Import button)

Keep these limitations in mind when building workflows with the Rebuy Post-Purchase Event trigger.

The Rebuy Reports tab lets you export Post-Purchase order data directly from your Rebuy Admin without needing Shopify Flow.

This downloads a CSV file containing Shopify Order IDs and showing which orders include Rebuy Post-Purchase items.

For more details, refer to the Post-Purchase Reporting Analytics help article.

Yes, you can track Post-Purchase orders without Shopify Flow by exporting order data from Rebuy Reports. Navigate to Reports in your Rebuy Admin, select a date range, and click Download Report to download a CSV showing which Shopify orders include Rebuy Post-Purchase items. Shopify Flow is recommended if you want automatic order tagging and downstream automations.

No. Rebuy does not add attribution line item properties to orders for Post-Purchase items the way it does for widget-sourced cart items. Post-Purchase orders are tracked through Rebuy Reports, the Shopify order history identifier, or Shopify Flow triggers.

The eventType variable fires on a per-offer basis, meaning it captures each individual accept, decline, or view event as it happens. The orderProductType variable is different: it evaluates the full product composition of the order and only has a value once all customer interactions with post-purchase offers are complete. Use eventType when you want to react to each individual offer event, and orderProductType when you want to segment based on what was ultimately in the order.

Yes. Because the Rebuy Post-Purchase Event trigger fires in Shopify Flow, you can attach any Flow-compatible action to it, including order tagging, customer segmentation updates, and triggering email flows through platforms that integrate with Shopify Flow.

Shopify Flow is not a Rebuy product, and Rebuy Support is unable to assist with building or troubleshooting flows. For help with Shopify Flow, contact the Shopify Support team directly.