Work through these in order.
1. The change was not saved
Edits apply only after you select Save in the bar at the top of Shopify Admin. If you left the page without saving, the rule is unchanged.
2. The rule is not Activated
Open the rule and check Rule Status. Only Activated rules affect checkout; a Draft rule is saved but does nothing.
3. You are looking at an old checkout
A checkout opened before the change keeps its original options.
- Close the checkout tab.
- Go back to the store and open the cart.
- Select Check out again.
For the cleanest test, use a private browser window.
4. You are looking in the wrong place
Rules apply on the checkout page itself. They do not change:
- The cart page.
- Shopify POS.
- The draft order screen in Shopify Admin — the rule applies when the customer opens the checkout link.
- Express checkout buttons such as Apple Pay and Shop Pay — they are handled separately. See express checkout buttons still showing.
5. Your test cart does not match the conditions
If the rule has conditions, your test cart must meet them. See condition is not working.
Still the same?
The method name probably does not match checkout exactly. See method name is not matching, then rule is not working for the remaining causes.