Case study
The same request, twice
A retry returns the decision already written.
The situation
The network drops after a decision. The caller sends the same request again.
What the agent tried
A second call asks for a second action.
What the check did
The check returns the decision already written. It does not evaluate the action again.
What you can show
One decision. One record. Not two payments, and not two audit entries.
More of the house: Gateway, Nexus, the open protocol.