diff --git a/src/main/java/software/amazon/cloudformation/LambdaWrapper.java b/src/main/java/software/amazon/cloudformation/LambdaWrapper.java
index 502f391c..287fc95e 100644
--- a/src/main/java/software/amazon/cloudformation/LambdaWrapper.java
+++ b/src/main/java/software/amazon/cloudformation/LambdaWrapper.java
@@ -137,8 +137,7 @@ public LambdaWrapper(final CredentialsProvider providerCredentialsProvider,
     private void initialiseRuntime(final String resourceType,
                                    final Credentials providerCredentials,
                                    final String providerLogGroupName,
-                                   final Context context,
-                                   final String awsAccountId) {
+                                   final Context context) {
 
         this.loggerProxy = new LoggerProxy();
         this.metricsPublisherProxy = new MetricsPublisherProxy();
@@ -160,7 +159,7 @@ private void initialiseRuntime(final String resourceType,
 
             if (this.providerMetricsPublisher == null) {
                 this.providerMetricsPublisher = new MetricsPublisherImpl(this.providerCloudWatchProvider, this.loggerProxy,
-                                                                         awsAccountId, resourceType);
+                                                                         resourceType);
             }
             this.metricsPublisherProxy.addMetricsPublisher(this.providerMetricsPublisher);
             this.providerMetricsPublisher.refreshClient();
@@ -255,7 +254,7 @@ public void handleRequest(final InputStream inputStream, final OutputStream outp
 
         // initialise dependencies
         initialiseRuntime(request.getResourceType(), request.getRequestData().getProviderCredentials(),
-            request.getRequestData().getProviderLogGroupName(), context, request.getAwsAccountId());
+            request.getRequestData().getProviderLogGroupName(), context);
 
         // transform the request object to pass to caller
         ResourceHandlerRequest<ResourceT> resourceHandlerRequest = transform(request);
diff --git a/src/main/java/software/amazon/cloudformation/metrics/MetricsPublisherImpl.java b/src/main/java/software/amazon/cloudformation/metrics/MetricsPublisherImpl.java
index a44a525c..78e7c319 100644
--- a/src/main/java/software/amazon/cloudformation/metrics/MetricsPublisherImpl.java
+++ b/src/main/java/software/amazon/cloudformation/metrics/MetricsPublisherImpl.java
@@ -33,18 +33,15 @@ public class MetricsPublisherImpl extends MetricsPublisher {
     private final CloudWatchProvider cloudWatchProvider;
 
     private Logger loggerProxy;
-    private String providerAccountId;
 
     private CloudWatchClient cloudWatchClient;
 
     public MetricsPublisherImpl(final CloudWatchProvider cloudWatchProvider,
                                 final Logger loggerProxy,
-                                final String providerAccountId,
                                 final String resourceTypeName) {
         super(resourceTypeName);
         this.cloudWatchProvider = cloudWatchProvider;
         this.loggerProxy = loggerProxy;
-        this.providerAccountId = providerAccountId;
     }
 
     public void refreshClient() {
@@ -115,8 +112,7 @@ private void publishMetric(final String metricName,
             .timestamp(timestamp).build();
 
         PutMetricDataRequest putMetricDataRequest = PutMetricDataRequest.builder()
-            .namespace(String.format("%s/%s/%s", Metric.METRIC_NAMESPACE_ROOT, providerAccountId, resourceNamespace))
-            .metricData(metricDatum).build();
+            .namespace(String.format("%s/%s", Metric.METRIC_NAMESPACE_ROOT, resourceNamespace)).metricData(metricDatum).build();
 
         try {
             this.cloudWatchClient.putMetricData(putMetricDataRequest);
diff --git a/src/test/java/software/amazon/cloudformation/metrics/MetricsPublisherImplTest.java b/src/test/java/software/amazon/cloudformation/metrics/MetricsPublisherImplTest.java
index 631b85d2..bba5627e 100644
--- a/src/test/java/software/amazon/cloudformation/metrics/MetricsPublisherImplTest.java
+++ b/src/test/java/software/amazon/cloudformation/metrics/MetricsPublisherImplTest.java
@@ -51,7 +51,6 @@ public class MetricsPublisherImplTest {
     @Mock
     private CloudWatchClient providerCloudWatchClient;
 
-    private String awsAccountId = "77384178834";
     private final String resourceTypeName = "AWS::Test::TestModel";
 
     @BeforeEach
@@ -70,7 +69,7 @@ public void afterEach() {
     @Test
     public void testPublishDurationMetric() {
         final MetricsPublisherImpl providerMetricsPublisher = new MetricsPublisherImpl(providerCloudWatchProvider, loggerProxy,
-                                                                                       awsAccountId, resourceTypeName);
+                                                                                       resourceTypeName);
         providerMetricsPublisher.refreshClient();
 
         final Instant instant = Instant.parse("2019-06-04T17:50:00Z");
@@ -80,8 +79,7 @@ public void testPublishDurationMetric() {
         verify(providerCloudWatchClient).putMetricData(argument1.capture());
 
         final PutMetricDataRequest request = argument1.getValue();
-        assertThat(request.namespace())
-            .isEqualTo(String.format("%s/%s/%s", "AWS/CloudFormation", awsAccountId, "AWS/Test/TestModel"));
+        assertThat(request.namespace()).isEqualTo(String.format("%s/%s", "AWS/CloudFormation", "AWS/Test/TestModel"));
 
         assertThat(request.metricData()).hasSize(1);
         final MetricDatum metricDatum = request.metricData().get(0);
@@ -96,7 +94,7 @@ public void testPublishDurationMetric() {
     @Test
     public void testPublishExceptionMetric() {
         final MetricsPublisherImpl providerMetricsPublisher = new MetricsPublisherImpl(providerCloudWatchProvider, loggerProxy,
-                                                                                       awsAccountId, resourceTypeName);
+                                                                                       resourceTypeName);
         providerMetricsPublisher.refreshClient();
 
         final Instant instant = Instant.parse("2019-06-03T17:50:00Z");
@@ -107,8 +105,7 @@ public void testPublishExceptionMetric() {
         verify(providerCloudWatchClient).putMetricData(argument1.capture());
 
         final PutMetricDataRequest request = argument1.getValue();
-        assertThat(request.namespace())
-            .isEqualTo(String.format("%s/%s/%s", "AWS/CloudFormation", awsAccountId, "AWS/Test/TestModel"));
+        assertThat(request.namespace()).isEqualTo(String.format("%s/%s", "AWS/CloudFormation", "AWS/Test/TestModel"));
 
         assertThat(request.metricData()).hasSize(1);
         final MetricDatum metricDatum = request.metricData().get(0);
@@ -125,7 +122,7 @@ public void testPublishExceptionMetric() {
     @Test
     public void testPublishInvocationMetric() {
         final MetricsPublisherImpl providerMetricsPublisher = new MetricsPublisherImpl(providerCloudWatchProvider, loggerProxy,
-                                                                                       awsAccountId, resourceTypeName);
+                                                                                       resourceTypeName);
         providerMetricsPublisher.refreshClient();
 
         final Instant instant = Instant.parse("2019-06-04T17:50:00Z");
@@ -135,8 +132,7 @@ public void testPublishInvocationMetric() {
         verify(providerCloudWatchClient).putMetricData(argument1.capture());
 
         final PutMetricDataRequest request = argument1.getValue();
-        assertThat(request.namespace())
-            .isEqualTo(String.format("%s/%s/%s", "AWS/CloudFormation", awsAccountId, "AWS/Test/TestModel"));
+        assertThat(request.namespace()).isEqualTo(String.format("%s/%s", "AWS/CloudFormation", "AWS/Test/TestModel"));
 
         assertThat(request.metricData()).hasSize(1);
         final MetricDatum metricDatum = request.metricData().get(0);