The post-purchase upsell appears after the shopper has paid but before they reach the order confirmation page. They accept with one tap and the item joins the order they just placed, on the card they already used. No second checkout, no re-entering payment details. It is the only CartSella upsell that applies its own discount, because it is the only one adding to an order CartSella controls. It also works on every plan, unlike the checkout upsell.
The Shopify post-purchase page showing a CartSella one-click offer with a product image, discounted price, Add to order button and a decline link

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Where the shopper sees it

On Shopify’s post-purchase page, a screen Shopify shows between payment and the thank-you page. Only one app can own that page, so CartSella has to be the one selected in your checkout settings.

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Set one up

1

Turn the post-purchase page on

In your Shopify admin, go to Settings → Checkout, scroll to Post-purchase page, and select CartSella from the list. The editor sidebar has an Open checkout settings button that takes you there. Without this step nothing you configure here can appear.
2

Create it

Upsells → Create upsell → Post-purchase upsell.
3

Name it

Fill in the Storefront title and, optionally, dates.
4

Pick the product

One product for the Standard and Forgotten item templates, up to three for Multi-product. Hand-picked only.
5

Set the discount

This is the one place a CartSella upsell discount is really applied. Percentage or fixed amount.
6

Choose a template and write the copy

In the Post-purchase template section.
7

Activate

Set the status to Active and save. There is no block to place.
Shopify Settings, Checkout, with the Post-purchase page section expanded and CartSella selected from the app list
If another app is already selected as your post-purchase app, selecting CartSella replaces it. Shopify allows exactly one.

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Templates

Pick one in the Post-purchase template section.
The Post-purchase template section showing the Standard, Forgotten item and Multi-product template cards
Picking a second product switches the template to Multi-product for you, and switching back to a single-product template trims the selection down to the first product. The maximum is three either way.
Under the template picker you write the copy:
  • Title and Subtitle, the headline pair at the top.
  • Add to order button, the accept label.
  • Decline button, the “no thanks” link under it.
Colours, fonts and card geometry come from Shopify’s post-purchase UI and cannot be changed. It is Shopify’s screen, and it looks like the rest of the checkout for a reason.

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Products

Post-purchase upsells only work with manually picked products. Automatic recommendations from Shopify Search & Discovery are ignored here, because the offer has to be signed and priced before the page renders, and there is no time to ask another app what to show.
The best post-purchase product is cheap, obvious and needs no thought: a refill, a second pair, a care kit, the matching accessory. The shopper decides in about three seconds. Anything that needs a size or colour choice loses.

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Discount

Tick Enable discount, choose percentage or fixed amount, and set a value. Percentages are capped at 100. This discount is real. The shopper sees the crossed-out original price next to the discounted one, and the item is added to the order at that price.

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Everything in the editor

The post-purchase upsell editor with Products to recommend, Discount and Post-purchase template sections and the enable-in-checkout sidebar card
The When to show condition reads a live cart, and by the post-purchase page the cart is gone. Every active post-purchase upsell is offered, in priority order. To narrow the audience, use Eligibility & targeting and Maximum uses instead.

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Eligibility & targeting

Customer tags and Customer location are both checked against the order that was just placed, so they work exactly as you would expect: the tags on the customer account, and the country on the shipping address. Traffic source and Markets rules do not apply after payment and are ignored rather than hiding the offer.
A customer location rule set to exclude, on an order with no shipping address at all (digital goods), blocks the offer. Without an address there is no country to check, and CartSella will not show an offer it cannot verify.

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Advanced options

  • Priority, 1 to 10, default 5. Here it also sets the step order: with several active post-purchase upsells, the lowest number is offered first, then the next, as steps of the same funnel.
  • Maximum uses, a total cap and a per-customer cap. Both off by default. See Advanced offer settings.
The cart exclusion and subscribe-and-save toggles are hidden for this type. There is no cart left to exclude anything from.

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Limits and gotchas

  • Nothing appears until CartSella is selected under Settings → Checkout → Post-purchase page. This is the single most common reason a post-purchase upsell never shows.
  • Shopify does not show the post-purchase page for every order. Orders paid with some accelerated or offsite payment methods, and orders with certain subscription or multi-currency setups, skip it. That is Shopify’s decision, not a CartSella setting.
  • The offered product must be in stock and purchasable at that moment, or the offer is skipped.
  • Keep the funnel to one or two steps. A third screen between payment and the receipt reads as an obstacle course.
  • Only upsells that are live right now count toward your plan’s active upsell cap. See Plans and billing.