diff --git a/eth/api_backend.go b/eth/api_backend.go
index dc84b4d740..9cbe57202a 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -116,9 +116,10 @@ type nonceTracker struct {
 }
 
 type nonceReservation struct {
-	deadline time.Time
-	used     bool
-	expired  bool
+	deadline  time.Time
+	used      bool
+	expired   bool
+	firstHash common.Hash
 }
 
 const reservationTTL = 30 * time.Second
@@ -253,14 +254,24 @@ func (b *EthAPIBackend) validateAndConsumeSequencerReservation(tx *types.Transac
 	if r == nil {
 		return nil
 	}
-	if r.used {
-		return fmt.Errorf("reserved nonce already used: %d", tx.Nonce())
-	}
 	// If expired or past deadline, reject to force client to rebuild with a new reservation
 	if r.expired || time.Now().After(r.deadline) {
 		return fmt.Errorf("reserved nonce expired: %d", tx.Nonce())
 	}
+	// If the reservation has already been used, allow rebroadcasts or fee-bump
+	// replacements to proceed. The txpool is the source of truth for
+	// "already known" and replacement underpricing semantics. Emit a clear log.
+	if r.used {
+		if r.firstHash == tx.Hash() {
+			log.Info("[SSV] Re-received tx for reserved nonce (rebroadcast)", "nonce", tx.Nonce(), "txHash", tx.Hash())
+		} else {
+			log.Info("[SSV] Re-received tx for reserved nonce (replacement)", "nonce", tx.Nonce(), "txHash", tx.Hash(), "firstHash", r.firstHash)
+		}
+		return nil
+	}
 	r.used = true
+	r.firstHash = tx.Hash()
+	log.Info("[SSV] Consuming reserved nonce for tx", "nonce", tx.Nonce(), "txHash", tx.Hash())
 	return nil
 }
 
diff --git a/eth/api_userops.go b/eth/api_userops.go
index 6ffcca52f4..3f98c7cbdf 100644
--- a/eth/api_userops.go
+++ b/eth/api_userops.go
@@ -580,6 +580,9 @@ func (api *composeUserOpsAPI) BuildSignedUserOpsTx(
 		return nil, fmt.Errorf("sign tx: %w", err)
 	}
 
+	// Log the reserved nonce and the resulting tx hash together for traceability.
+	log.Info("[SSV] Reserved sequencer nonce for tx", "nonce", nonce, "txHash", signedTx.Hash())
+
 	log.Info("[SSV] Signed user transaction with sequencer key",
 		"txHash", signedTx.Hash().Hex(),
 		"chainID", api.b.ChainConfig().ChainID,