Conflict resolution

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Imported from previous forum

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Hello-

I’m new to FIX so please excuse the naivety of my question.

I’m trying to find out if there is a standard way to do conflict resolution of orders within FIX. Basically, I am currently architecting a solution that will involve multiple parties sharing an order book. Occasionally, 2 or more parties may enter the same order. When this is detected, I will need a way to send a FIX message instructing the receiver that Order_A and Order_B are the same and to remove Order_A.

If anyone has suggestions on how to express this message or point me to a resource that describes handling this scenario, it would be very much appreciated.

Thanks
-herb