> For the complete documentation index, see [llms.txt](https://docs.neox.vn/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.neox.vn/docs/payment-gateway/transaction-management/error-codes.md).

# Error Codes

### Table of error code

<table><thead><tr><th width="165.5">Error Code</th><th>Description</th></tr></thead><tbody><tr><td>0</td><td>Payment successful</td></tr><tr><td>1</td><td>Payment failed</td></tr><tr><td>9</td><td>Order is waiting for payment</td></tr><tr><td>18</td><td>Order is cancelled by customer</td></tr><tr><td>19</td><td>"<em>neo_MerchantTxnID</em>" is duplicated.</td></tr><tr><td>30</td><td>Payment gateway integration information has not been approved</td></tr><tr><td>31</td><td>Invalid <em>neo_OrderID</em></td></tr><tr><td>32</td><td>Invalid <em>neo_MerchantTxnID</em></td></tr><tr><td>33</td><td>Invalid <em>neo_Amount</em></td></tr><tr><td>34</td><td>Invalid neo_Currency</td></tr><tr><td>35</td><td>Creating a payment link failed because the merchant has not yet allowed payment via international cards</td></tr><tr><td>36</td><td>Payment with token only support for international cards</td></tr><tr><td>37</td><td>Invalid <em>neo_Amount (with</em> decimal for currencies other than VND<em>)</em></td></tr><tr><td>40</td><td>Invalid neo_ExtData</td></tr><tr><td>41</td><td>Invalid neo_ExtData.payItems.orderId</td></tr><tr><td>42</td><td>The price of total products does not match to the total amount</td></tr><tr><td>43</td><td>Merchant hasn't registed for credit bill holding feature</td></tr><tr><td>51</td><td>Only unprocessed orders can be canceled</td></tr><tr><td>99</td><td>Order is processing.</td></tr><tr><td>-1</td><td>Order is expired</td></tr></tbody></table>


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