The most expensive email in e-commerce is the one nobody validates
The customer typed gmial.com. Checkout succeeded, payment cleared, the order shipped — and they have received nothing. So they email support asking whether the order went through, or they file a chargeback, because as far as they can tell it did not.
Every downstream message — shipping, delivery, review request, the entire post-purchase lifecycle you built — routes through an address typed once, on a phone, at speed.
How it works
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1
Validate on blur, before the pay button. Never after payment.
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2
On a likely typo, suggest the correction inline. Do not block — suggest. A hard block on a checkout field costs you the order.
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3
Block only clear invalids and disposables, and let everything else through.
Rules for checkout specifically
Never block on timeout. A verification hiccup must never cost a sale. Fail open, always.
Suggest, do not reject. “Did you mean [email protected]?” as a one-tap fix recovers both the order and the customer's inbox.
Guest checkout is where this pays. No account means no second chance to reach them.
Validate before payment. Correcting an address after the charge means a support ticket either way.
Will this hurt my checkout conversion rate?
Not if you suggest rather than block and fail open. The conversion risk comes from hard-blocking on a slow response, which is why you do not do that.
Does it work with Shopify, WooCommerce or a custom checkout?
Anywhere you can make a server-side HTTP call at checkout.
What about existing customer records?
Bulk verify your customer table once to find addresses that have gone dead since purchase.
What is the cost per order?
$0.00075. Ten thousand orders costs $7.50.
Does it help with fraud?
Disposable address detection is a useful signal in a fraud score. It is not a fraud tool on its own.
Add checkout validation free — 100 credits, no card required.