Imported from previous forum
This must be a FAQ and the most basic of all questions. Surely there’s a guidebook to show cancel/bust of trades are done, corrections of trades, and creation then correction of orders? The situations I have in mind are between a sellside entity and a broker/dealer or a sellside entity and an exchange.
Thank you
Look thru “Order State Change Matrices” in the FIX specifications located at
http://fixprotocol.org/specifications/
Hopefully that answers your questions, else you can post your new question here 
This must be a FAQ and the most basic of all questions. Surely there’s a
guidebook to show cancel/bust of trades are done, corrections of trades,
and creation then correction of orders? The situations I have in mind
are between a sellside entity and a broker/dealer or a sellside entity
and an exchange.Thank you