<form action="https://www.payfast.co.za/eng/process"method="post">
  <input type="hidden" name="merchant_id" value="18398200">
<input type="hidden" name="merchant_key" value="	8ii1iisirhl94">
<input type="hidden" name="return_url" value="https://www.example.com/success">
<input type="hidden" name="cancel_url" value="https://www.example.com/cancel">
<input type="hidden" name="notify_url" value="https://www.example.com/notify"><input type="hidden" name="amount" value="275.00">
   <input type="hidden" name="item_name" value="Grubridez tickets"><input type="hidden" name="setup" value='{
  "split_payment" : {
    "merchant_id": 12144703,20609687
    "percentage":18,
    "min": 500,
    "max": 500
  }
}'>
   <input type="submit">
</form>