Detect Duplicate Orders
Before You Ship Twice

How to Combine Orders on Shopify

Shopify does not provide a native feature to merge or combine multiple orders from the same customer. When a customer places two orders in quick succession—common when they forget an item or change quantities—merchants are left to manually identify these duplicates before fulfillment.

The Manual Approach

Without a tool, you would need to check each order's customer email or name against other unfulfilled orders in your queue. This is time-consuming and error-prone, especially during high-volume periods like sales or holidays.

How OrderMerge Solves This

OrderMerge automates duplicate detection by checking the customer_id field against all unfulfilled orders when you open any order in Shopify Admin. If a match is found, an alert banner appears at the top of the order detail page with a direct link to the other order.

This allows your fulfillment team to combine the items into a single shipment before printing labels—saving on shipping costs, packaging materials, and labor time.

Why Alert-Only?

Automatically merging orders can cause issues with tax calculations, partial refunds, and third-party integrations like ERPs and accounting software. OrderMerge takes a read-only approach: it surfaces the information, but leaves the final decision and action to your team.