On this page there’s 3 highlights (view in Baymard Premium) outlining what Amazon are doing right and wrong.
(Tip: use the arrows above or on your keyboard to navigate all 231 address validator examples.)

The screenshot was taken on August 3, 2021 and depicts Amazon’s Address Validator. In total, we’ve reviewed 90 of Amazon’s page designs. To see them all, visit the full Amazon UX case study.