Verify emails at Shopify checkout and signup

Why Shopify stores verify at the point of capture

A Shopify store collects email in two high-stakes moments: at checkout and at newsletter signup. Both feed critical mail. The checkout email receives the order confirmation, the receipt, and every shipping update — if it's mistyped or fake, the customer never gets their confirmation, support tickets pile up, and a genuine buyer thinks the order failed. Newsletter signups feed your marketing list, and every fake or disposable address there is a future bounce that erodes the sender reputation your promotional email relies on.

Disposable and fake addresses at checkout are also a fraud signal. Orders placed with throwaway mailboxes are disproportionately linked to card testing, chargebacks, and abuse, because a real customer wanting their goods gives a real email. Catching a disposable address at checkout lets you add friction — a verification step or manual review — before you fulfill and eat the loss.

Verifly verifies the address inline and returns deliverable, undeliverable, or risky with disposable, role, and catch-all flags. Wire it into your checkout extension or theme's signup form, and you cut fake orders, keep transactional mail deliverable, and stop dead addresses from ever entering your Shopify Email or Klaviyo list.

Verify at checkout and signup

1. Call GET /verify from a Shopify checkout UI extension or your newsletter form handler as the shopper submits.
2. Register a free key at verifly.email/api/v1/autonomous/register (100 credits, no card, no captcha).
3. At signup, block or re-prompt on undeliverable and disposable results so fakes never join the list.
4. At checkout, flag disposable or undeliverable addresses for review rather than silently confirming a doomed order.
5. For an existing customer list, batch-verify with /verify/batch before your next marketing send.

async function verifyCheckoutEmail(email) {
  const res = await fetch(
    `https://verifly.email/api/v1/verify?email=${encodeURIComponent(email)}`,
    { headers: { 'Authorization': 'Bearer vf_your_api_key' } }
  )
  const data = await res.json()
  if (data.disposable) return { action: 'review', reason: 'disposable address' }
  if (data.result !== 'deliverable') return { action: 'reprompt', reason: 'undeliverable' }
  return { action: 'proceed' }
}