What tools are you using to cut down on failed Shopify deliveries?

We’ve been working on a small but helpful tool called Address Validation iO — it adds a quick address check at checkout to catch missing house numbers, invalid formats, or PO boxes before customers place their order.

After seeing a bunch of Shopify brands struggle with failed shipments (and expensive resends), we built this to make shipping smoother without slowing down conversion.

I’d love to hear what other people are using to reduce bad addresses or cut down on fulfillment mistakes — or if this is even something you’ve run into?

Happy to share what we’ve learned from the stores already using it.