The Validate Discount tool simulates a cart against your reward configuration and reports exactly what would happen at checkout.
What it tells you
Which tiers qualify based on the simulated cart
Which products are flagged as gifts
Total savings (per discount and overall)
Any conflicts with other discounts (combination rules, function limits)
When to use it
Before a big sale — Confirm new tiers behave correctly under realistic carts.
After migrating to the unified function — Verify nothing broke.
When a customer reports an issue — Reproduce their cart and see what the function says.
How to access
Open Cart Editor → Rewards → Validate, or Settings → Discounts → Validate.