Hide Express shipping when you can't deliver on it

Offering express you can't fulfill is a refund waiting to happen. The classic case: express to a PO box that your carrier won't touch.

This is Drydock's demo rule — two conditions, one action — and the simulator's trace shows both conditions passing on “PO Box 1234” and failing on “123 Main St”. Two minutes from install to tested rule.

Test first. Undo after. Always.

Drydock runs every draft rule against a synthetic checkout — real products, any address, any customer — and shows a trace of every condition with the actual values compared. Save good scenarios as test cases and they re-run on every publish, so a rule that changes an outcome gets flagged on the publish screen instead of at your checkout. Every publish is an immutable version with a diff, and restoring a previous version is one click.