diff --git a/pkg/exchange/auto.go b/pkg/exchange/auto.go
index e8397f56..27e06834 100644
--- a/pkg/exchange/auto.go
+++ b/pkg/exchange/auto.go
@@ -163,6 +163,11 @@ type ExchangeOutcome struct {
 	ExchangeID         string
 	UtilizationPct     float64
 	Error              string
+	// OutcomeUnknown is true when the accept response was lost, so the exchange
+	// may have executed. It must be reconciled before any retry. The outcome
+	// stays in AutoExchangeResult.Failed (readers of Failed still see it) and
+	// halts the run (no further exchanges are attempted).
+	OutcomeUnknown bool
 	// Simulated is true when RunAutoExchangeParams.DryRun was set. The outcome
 	// was analyzed and quoted but no record was saved and no exchange was executed.
 	Simulated bool
@@ -573,6 +578,7 @@ func processAutoExchange(ctx context.Context, params RunAutoExchangeParams, rec
 		logging.Errorf("exchange execution failed for %s: %v", rec.SourceRIID, execErr)
 		outcome.Error = execErr.Error()
 		if errors.Is(execErr, common.ErrOutcomeUnknown) {
+			outcome.OutcomeUnknown = true
 			// The exchange may have happened: keep the record processing (still
 			// counted against the cap) and stop, instead of marking it failed.
 			return outcome, true
diff --git a/pkg/exchange/outcome_test.go b/pkg/exchange/outcome_test.go
index ba627a29..f5ca053e 100644
--- a/pkg/exchange/outcome_test.go
+++ b/pkg/exchange/outcome_test.go
@@ -3,6 +3,7 @@ package exchange
 import (
 	"context"
 	"errors"
+	"fmt"
 	"math/big"
 	"net"
 	"net/http"
@@ -111,3 +112,32 @@ func TestRunAutoExchange_UnknownAcceptLeavesRecordProcessingAndHalts(t *testing.
 	require.NotEmpty(t, store.savedRecords)
 	assert.NotEqual(t, "failed", store.savedRecords[0].Status)
 }
+
+func TestRunAutoExchange_OutcomeUnknownFlag(t *testing.T) {
+	t.Parallel()
+	cases := []struct {
+		name        string
+		execErr     error
+		wantUnknown bool
+		wantFailed  int
+	}{
+		{"wrapped unknown sets the flag", fmt.Errorf("x: %w", common.ErrOutcomeUnknown), true, 0},
+		{"plain error leaves it false", errors.New("boom"), false, 1},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			store := &mockExchangeStore{dailySpend: "0"}
+			client := &mockExchangeClient{quoteResult: defaultQuote(), executeErr: tc.execErr}
+			params := defaultParams(store, client)
+			params.Config.Mode = "auto"
+
+			result, err := RunAutoExchange(context.Background(), params)
+			require.NoError(t, err)
+			assert.Equal(t, 1, client.executeCalls)
+			assert.Equal(t, tc.wantFailed, store.failCalls)
+			require.Len(t, result.Failed, 1)
+			assert.Equal(t, tc.wantUnknown, result.Failed[0].OutcomeUnknown)
+		})
+	}
+}