diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 0c6b897dd..e722d420c 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -2849,7 +2849,7 @@ func (bc *Blockchain) PoolTxWithData(t *transaction.Transaction, data any, mp *m
 	if verificationFunction != nil {
 		err := verificationFunction(t, data)
 		if err != nil {
-			return err
+			return fmt.Errorf("data verification failed: %w", err)
 		}
 	}
 	return bc.verifyAndPoolTx(t, mp, feer, data)
diff --git a/pkg/network/server.go b/pkg/network/server.go
index 848b4f0c7..bc7decb0c 100644
--- a/pkg/network/server.go
+++ b/pkg/network/server.go
@@ -1325,7 +1325,11 @@ func (s *Server) RelayP2PNotaryRequest(r *payload.P2PNotaryRequest) error {
 
 // verifyAndPoolNotaryRequest verifies NotaryRequest payload and adds it to the payload mempool.
 func (s *Server) verifyAndPoolNotaryRequest(r *payload.P2PNotaryRequest) error {
-	return s.chain.PoolTxWithData(r.FallbackTransaction, r, s.notaryRequestPool, s.notaryFeer, s.verifyNotaryRequest)
+	err := s.chain.PoolTxWithData(r.FallbackTransaction, r, s.notaryRequestPool, s.notaryFeer, s.verifyNotaryRequest)
+	if err != nil {
+		return fmt.Errorf("failed to add fallback transaction to the notary pool: %w", err)
+	}
+	return nil
 }
 
 // verifyNotaryRequest is a function for state-dependant P2PNotaryRequest payload verification which is executed before ordinary blockchain's verification.