DPO Pay handles card entry, security checks, 3-D Secure, fraud logic, and transaction authorization.

Redirect URL Format

https://secure.3gdirectpay.com/pay.asp?ID={TransToken}

Example Redirect (HTML Button)

<a href="https://secure.3gdirectpay.com/pay.asp?ID=1B454D71-23EB-42E9-8FE8-FDDC167B5BCD"
   class="btn btn-primary">
  Proceed to Payment
</a>

Example button:

🛒 Proceed to Payment

PHP Redirect

header("Location: https://secure.3gdirectpay.com/pay.asp?ID=" . $transToken);
exit;

Node.js / Express Redirect

res.redirect("https://secure.3gdirectpay.com/pay.asp?ID=" + transToken);

Optional: Embedded Checkout (iframe)

Use only if your UX requires inline checkout
(DPO still hosts card entry — PCI safe)

<iframe 
  src="https://secure.3gdirectpay.com/pay.asp?ID=1B454D71-23EB-42E9-8FE8-FDDC167B5BCD"
  width="100%"
  height="650"
  frameborder="0"
  scrolling="yes">
</iframe>

Payment Flow

sequenceDiagram
  participant M as Merchant Site
  participant U as Customer
  participant D as DPO Checkout

  M->>U: Display checkout button
  U->>D: Redirect via payment URL
  D-->>U: Payment screen
  D-->>M: BackURL callback with result
  U-->>M: RedirectURL browser return

Best Practices

Use a loading screen during redirect
Store TransToken + CompanyRef
Wait for BackURL webhook for final confirmation
(Redirect is cosmetic, webhook is final truth)

Next Steps

After redirect is complete:

Need	Link
Receive payment result	✅ Payment Callbacks
Display order summary	✅ Merchant UX
Check final status	✅ Status Lookup
Handle refunds/voids	✅ Refund & Void