This is done by submitting a form with the PAY_REQUEST_ID and CHECKSUM to the /process.trans endpoint.

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Both field names must be posted in uppercase, and the CHECKSUM must be calculated correctly to ensure the transaction is accepted.

Redirect Endpoint

POST https://secure.paygate.co.za/payweb3/process.trans

Example redirect form:

<form action="https://secure.paygate.co.za/payweb3/process.trans" method="POST">
  <input type="hidden" name="PAY_REQUEST_ID" value="23B785AE-C96C-32AF-4879-D2C9363DB6E8">
  <input type="hidden" name="CHECKSUM" value="b41a77f83a275a849f23e30b4666e837">
  <input type="submit" value="Continue to PayWeb">
</form>

Required Fields

Field	Description	Type	Required
PAY_REQUEST_ID	The unique transaction reference returned by PayWeb during the `/initiate.trans` step.	`varchar(36)`	✅
CHECKSUM	MD5 hash of `PAYGATE_ID + PAY_REQUEST_ID + REFERENCE + encryption key`.	`varchar(32)`	✅

Make sure your CHECKSUM includes all required values from the original request. For help calculating it, see the Security section.

Redirect Errors

If the redirect fails or the CHECKSUM is invalid, an error message will be displayed to the client. For a list of possible error messages, refer to the Error Codes section.

What's Next?

Once the client completes their payment, PayWeb will:

Send a Notify POST to your NOTIFY\_URL (if specified)

Redirect the customer to your RETURN\_URL