SellUp now allows for merchants to create Post Purchase Upsells. This is part of SellUp Pro.
These are great in securing instant repeat orders from logged in users who have just checked out. You can show an ultra tempting offer with an urgency based countdown to hopefully secure another instant order.
Post Purchase Upsell is a premium feature and requires an active Pro Plan.
Check a Post Purchase Upsell is active
If you have created a Post Purchase Upsell and wish to check it, you can do so by simply viewing the Thank You page on any order.
To do this, navigate to Orders in Shopify Dashboard.
Simply click on an Order. Once you have the order up, click More Actions and View the Order Status Page.