diff --git a/go/enclave/components/rollup_consumer.go b/go/enclave/components/rollup_consumer.go
index c75c8444d..5ce9d529c 100644
--- a/go/enclave/components/rollup_consumer.go
+++ b/go/enclave/components/rollup_consumer.go
@@ -27,7 +27,7 @@ type rollupConsumerImpl struct {
 	logger gethlog.Logger
 
 	storage      storage.Storage
-	sigValidator *SignatureValidator
+	sigValidator SequencerSignatureVerifier
 }
 
 func NewRollupConsumer(
@@ -36,7 +36,7 @@ func NewRollupConsumer(
 	rollupCompression *RollupCompression,
 	storage storage.Storage,
 	logger gethlog.Logger,
-	verifier *SignatureValidator,
+	verifier SequencerSignatureVerifier,
 ) RollupConsumer {
 	return &rollupConsumerImpl{
 		MgmtContractLib:   mgmtContractLib,
diff --git a/go/enclave/components/sigverifier.go b/go/enclave/components/sigverifier.go
index 5a85b2064..dc441fea4 100644
--- a/go/enclave/components/sigverifier.go
+++ b/go/enclave/components/sigverifier.go
@@ -12,13 +12,17 @@ import (
 	gethcommon "github.com/ethereum/go-ethereum/common"
 )
 
+// SequencerSignatureVerifier interface for signature validation
+type SequencerSignatureVerifier interface {
+	CheckSequencerSignature(hash gethcommon.Hash, sig []byte) error
+}
+
 type SignatureValidator struct {
 	attestedKey *ecdsa.PublicKey
 	storage     storage.Storage
 }
 
 func NewSignatureValidator(storage storage.Storage) (*SignatureValidator, error) {
-	// todo (#718) - sequencer identities should be retrieved from the L1 management contract
 	return &SignatureValidator{
 		storage:     storage,
 		attestedKey: nil,
@@ -36,11 +40,6 @@ func (sigChecker *SignatureValidator) CheckSequencerSignature(hash gethcommon.Ha
 		return fmt.Errorf("could not fetch sequencer IDs: %w", err)
 	}
 
-	// todo no-op for in-mem test, we can add a mock version of this
-	if len(sequencerIDs) == 0 {
-		return nil
-	}
-
 	// loop through sequencer keys and exit early if one of them matches
 	for _, seqID := range sequencerIDs {
 		attestedEnclave, err := sigChecker.storage.GetEnclavePubKey(context.Background(), seqID)
diff --git a/go/enclave/enclave_admin_service.go b/go/enclave/enclave_admin_service.go
index 7194c1869..d3c2c80e0 100644
--- a/go/enclave/enclave_admin_service.go
+++ b/go/enclave/enclave_admin_service.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/ten-protocol/go-ten/integration/ethereummock"
 	"math/big"
 	"sync"
 	"time"
@@ -68,11 +69,10 @@ func NewEnclaveAdminAPI(config *enclaveconfig.EnclaveConfig, storage storage.Sto
 		}
 	}
 	sharedSecretProcessor := components.NewSharedSecretProcessor(mgmtContractLib, attestationProvider, enclaveKeyService.EnclaveID(), storage, sharedSecretService, logger)
-	sigVerifier, err := components.NewSignatureValidator(storage)
+	sigVerifier, err := getSignatureValidator(config.UseInMemoryDB, storage)
 	if err != nil {
 		logger.Crit("Could not initialise the signature validator", log.ErrKey, err)
 	}
-
 	dataCompressionService := compression.NewBrotliDataCompressionService()
 
 	rollupCompression := components.NewRollupCompression(registry, batchExecutor, daEncryptionService, dataCompressionService, storage, gethEncodingService, chainConfig, config, logger)
@@ -600,3 +600,10 @@ func exportCrossChainData(ctx context.Context, storage storage.Storage, fromSeqN
 	} // todo: check fromSeqNo
 	return bundle, nil
 }
+
+func getSignatureValidator(useInMemDB bool, storage storage.Storage) (components.SequencerSignatureVerifier, error) {
+	if useInMemDB {
+		return ethereummock.NewMockSignatureValidator(), nil
+	}
+	return components.NewSignatureValidator(storage)
+}
diff --git a/go/enclave/nodetype/validator.go b/go/enclave/nodetype/validator.go
index 7383542b4..4a9939a9a 100644
--- a/go/enclave/nodetype/validator.go
+++ b/go/enclave/nodetype/validator.go
@@ -27,7 +27,7 @@ type validator struct {
 	chainConfig *params.ChainConfig
 
 	storage      storage.Storage
-	sigValidator *components.SignatureValidator
+	sigValidator components.SequencerSignatureVerifier
 	mempool      *components.TxPool
 
 	logger gethlog.Logger
@@ -39,7 +39,7 @@ func NewValidator(
 	registry components.BatchRegistry,
 	chainConfig *params.ChainConfig,
 	storage storage.Storage,
-	sigValidator *components.SignatureValidator,
+	sigValidator components.SequencerSignatureVerifier,
 	mempool *components.TxPool,
 	logger gethlog.Logger,
 ) Validator {
diff --git a/integration/ethereummock/mock_sigverifier.go b/integration/ethereummock/mock_sigverifier.go
new file mode 100644
index 000000000..f485fb3a7
--- /dev/null
+++ b/integration/ethereummock/mock_sigverifier.go
@@ -0,0 +1,16 @@
+package ethereummock
+
+import (
+	gethcommon "github.com/ethereum/go-ethereum/common"
+)
+
+type MockSignatureValidator struct{}
+
+func NewMockSignatureValidator() *MockSignatureValidator {
+	return &MockSignatureValidator{}
+}
+
+// CheckSequencerSignature - NO-OP
+func (sigChecker *MockSignatureValidator) CheckSequencerSignature(_ gethcommon.Hash, _ []byte) error {
+	return nil
+}