diff --git a/internal/node_client/node_client.go b/internal/node_client/node_client.go
index fcc6b1c66..3fad29003 100644
--- a/internal/node_client/node_client.go
+++ b/internal/node_client/node_client.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"runtime"
-	"strings"
 
 	sdkTx "github.com/bitcoin-sv/go-sdk/transaction"
 	"github.com/ordishs/go-bitcoin"
@@ -51,8 +50,6 @@ func New(n *bitcoin.Bitcoind, opts ...func(client *NodeClient)) (NodeClient, err
 	return node, nil
 }
 
-var ErrTransactionNotInMempool = errors.New("Transaction not in mempool")
-
 func (n NodeClient) GetMempoolAncestors(ctx context.Context, ids []string) ([]string, error) {
 	_, span := tracing.StartTracing(ctx, "NodeClient_GetMempoolAncestors", n.tracingEnabled, n.tracingAttributes...)
 	defer tracing.EndTracing(span)
@@ -64,9 +61,9 @@ func (n NodeClient) GetMempoolAncestors(ctx context.Context, ids []string) ([]st
 		nTx, err := n.bitcoinClient.GetMempoolAncestors(id, false)
 		tracing.EndTracing(span)
 		if err != nil {
-			if strings.Contains(err.Error(), "Transaction not in mempool") {
-				continue
-			}
+			//if strings.Contains(err.Error(), "Transaction not in mempool") {
+			//	continue
+			//}
 
 			return nil, errors.Join(ErrFailedToGetMempoolAncestors, err)
 		}
diff --git a/internal/node_client/node_client_test.go b/internal/node_client/node_client_test.go
index 08de136c0..8c67612f2 100644
--- a/internal/node_client/node_client_test.go
+++ b/internal/node_client/node_client_test.go
@@ -157,9 +157,10 @@ func TestNodeClient(t *testing.T) {
 		require.ErrorIs(t, err, node_client.ErrFailedToGetMempoolAncestors)
 
 		// when
-		_, err = sut.GetMempoolAncestors(ctx, []string{"792bb5c0d5e4937572e6368dc713ba0b4935d27a7b7ac654c2b384d6c8b2fb89"})
+		actual, err := sut.GetMempoolAncestors(ctx, []string{"792bb5c0d5e4937572e6368dc713ba0b4935d27a7b7ac654c2b384d6c8b2fb89"}) // tx id not existing in the mempool
 
 		// then
-		require.ErrorIs(t, err, node_client.ErrTransactionNotInMempool)
+		require.NoError(t, err)
+		require.Empty(t, actual)
 	})
 }
diff --git a/test/submit_01_single_test.go b/test/submit_01_single_test.go
index 5897d4246..88c3bbfe3 100644
--- a/test/submit_01_single_test.go
+++ b/test/submit_01_single_test.go
@@ -571,10 +571,11 @@ func TestPostCumulativeFeesValidation(t *testing.T) {
 	}
 
 	tt := []struct {
-		name      string
-		options   validationOpts
-		lastTxFee uint64
-		chainLong int
+		name           string
+		options        validationOpts
+		lastTxFee      uint64
+		chainLong      int
+		minedAncestors int
 
 		expectedStatusCode int
 		expectedTxStatus   string
@@ -599,7 +600,7 @@ func TestPostCumulativeFeesValidation(t *testing.T) {
 			expectedTxStatus:   StatusSeenOnNetwork,
 		},
 		{
-			name: "post  txs chain with too low fee with cumulative fees validation",
+			name: "post txs chain with too low fee with cumulative fees validation",
 			options: validationOpts{
 				performCumulativeFeesValidation: true,
 			},
@@ -608,16 +609,36 @@ func TestPostCumulativeFeesValidation(t *testing.T) {
 			expectedError:      "arc error 473: transaction fee is too low\nminimum expected cumulative fee: 84, actual fee: 1",
 		},
 		{
-			name: "post  txs chain with suficient fee with cumulative fees validation",
+			name: "post txs chain with too low fee with cumulative fees validation - some ancestors are mined",
+			options: validationOpts{
+				performCumulativeFeesValidation: true,
+			},
+			lastTxFee:          1,
+			minedAncestors:     2,
+			expectedStatusCode: 473,
+			expectedError:      "arc error 473: transaction fee is too low\nminimum expected cumulative fee: 84, actual fee: 1",
+		},
+		{
+			name: "post txs chain with sufficient fee with cumulative fees validation",
+			options: validationOpts{
+				performCumulativeFeesValidation: true,
+			},
+			lastTxFee:          90,
+			expectedStatusCode: 200,
+			expectedTxStatus:   StatusSeenOnNetwork,
+		},
+		{
+			name: "post txs chain with sufficient fee with cumulative fees validation - some ancestors are mined",
 			options: validationOpts{
 				performCumulativeFeesValidation: true,
 			},
 			lastTxFee:          90,
+			minedAncestors:     2,
 			expectedStatusCode: 200,
 			expectedTxStatus:   StatusSeenOnNetwork,
 		},
 		{
-			name: "post  txs chain with cumulative fees validation - chain too long - ignore it",
+			name: "post txs chain with cumulative fees validation - chain too long - ignore it",
 			options: validationOpts{
 				performCumulativeFeesValidation: true,
 			},
@@ -673,7 +694,7 @@ func TestPostCumulativeFeesValidation(t *testing.T) {
 						Vout:         0,
 						Address:      address,
 						ScriptPubKey: output.LockingScript.String(),
-						Amount:       float64(float64(output.Satoshis) / 1e8),
+						Amount:       float64(output.Satoshis) / 1e8,
 					}
 
 					tx, err := node_client.CreateTx(privateKey, address, utxo, zeroFee)
@@ -715,6 +736,30 @@ func TestPostCumulativeFeesValidation(t *testing.T) {
 				}
 			}
 
+			txRequests := make([]TransactionRequest, 0)
+			for _, chain := range zeroFeeChains {
+				for _, tx := range chain {
+					rawTx, err := tx.EFHex()
+					require.NoError(t, err)
+					body := TransactionRequest{RawTx: rawTx}
+					txRequests = append(txRequests, body)
+				}
+			}
+
+			for i, body := range txRequests {
+				if tc.minedAncestors > 0 && i == tc.minedAncestors {
+					node_client.Generate(t, bitcoind, 1)
+				}
+
+				resp := postRequest[TransactionResponse](t, arcEndpointV1Tx, createPayload(t, body),
+					map[string]string{
+						"X-WaitFor":           StatusSeenOnNetwork,
+						"X-SkipFeeValidation": strconv.FormatBool(true),
+					}, 200)
+
+				require.Equal(t, StatusSeenOnNetwork, resp.TxStatus)
+			}
+
 			// then
 			// create last transaction
 			var nodeUtxos []node_client.UnspentOutput