Mark orders as fulfilled and unfulfilled (cancel fulfillment)
Mark orders as paid (mark as paid)
Add/remove tags (tags)
MassFulfill is a Shopify app made for merchants to update a large amount of tracking information on Shopify using file uploads. It doesn’t do any physical fulfillments; it only updates information.
Home - Available options provided to update your orders
Upload - Upload a file from your computer or from Google docs
Headers - Select where to find the information in the file