Messages that you receive from TB.One (dispatch advices, cancellation or returns messages) are validated against the currently valid scheme file. The scheme file can be found at:

https://api.trade-server.net/schema/all_in_one/tb-order-desadv_all_in_one.xsd

The order messages may also be requested per REST-API. Here you’ll get all still open messages for all orders in the default XML format (<MESSAGE_LIST>). After successful processing, each message must be flagged as done (processed) using REST. This causes that the message won’t be exported again at the next call.