ZipSentry: Address Validator

Mistyped and incomplete shipping addresses lead to failed deliveries, refunds, and support tickets. ZipSentry checks every address at checkout against rules you choose, such as requiring a house number, blocking P.O. boxes, or validating postal code format. Each rule can block checkout or flag the order for review, so you decide what is worth stopping a sale over. Flagged customers can correct their own address on the order status page, and the dashboard estimates what every catch saved you.