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| Outcome | Application / operator action |
|---|---|
| Cancel or deny | Return the user outcome; do not initiate signing. |
| Timeout or expired challenge | Reconcile first; create a new request only with renewed user confirmation. |
| Callback state mismatch | Reject and investigate correlation, session and redirect binding. |
| Attribute unavailable or denied | Apply business policy; never substitute inferred identity data. |
| Signing provider unavailable | Preserve the uncertain state; reconcile or escalate without silently switching routes. |