Amazon MWS feed API Issue, to cancel orders

Question

please help me out for this. I am trying long back to cancel Amazon order via MWS Feed API. But it is not canceling at all. Feed submission and all is successfully working, but the order is not canceling. Below is my Feed XML, We are using Report type both I tried: _POST_ORDER_ACKNOWLEDGEMENT_DATA_, _POST_FLAT_FILE_ORDER_ACKNOWLEDGEMENT_DATA_

<?xml version="1.0"?>
    <AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema instance"xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
    <Header>
    <DocumentVersion>1.01</DocumentVersion>
    <MerchantIdentifier>My Store</MerchantIdentifier>
    </Header>
    <MessageType>OrderAcknowledgement</MessageType>
    <Message>
    <MessageID>1</MessageID>
    <OrderAcknowledgement>
    <AmazonOrderID>050-1234567-1234567</AmazonOrderID>
    <StatusCode>Failure</StatusCode>
    </OrderAcknowledgement>
    </Message>
   </AmazonEnvelope>

Answer 1

You have to cancel the items to cancel the order. Try this:

<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
    <Header>
        <DocumentVersion>1.01</DocumentVersion>
        <MerchantIdentifier>ANZE9ABCDEFGH</MerchantIdentifier>
    </Header>
    <MessageType>OrderAcknowledgement</MessageType> 
    <Message>
        <MessageID>1</MessageID>
        <OrderAcknowledgement>
            <AmazonOrderID>ORDER ID</AmazonOrderID>
            <StatusCode>Failure</StatusCode>
            <Item> 
                <AmazonOrderItemCode>ASIN</AmazonOrderItemCode>
                <CancelReason>REASON</CancelReason>
            </Item>
        </OrderAcknowledgement>
    </Message> 
</AmazonEnvelope>

Valid reason codes:

• NoInventory
• ShippingAddressUndeliverable
• CustomerExchange
• BuyerCanceled
• GeneralAdjustment
• CarrierCreditDecision
• RiskAssessmentInformationNotValid
• CarrierCoverageFailure
• CustomerReturn
• MerchandiseNotReceived

If you don't store ASINs in your order management system you can use <MerchantOrderItemID> in place of AmazonOrderItemCode

Here's a copy of the schema definition