diff --git a/core/src/main/java/google/registry/flows/session/LoginFlow.java b/core/src/main/java/google/registry/flows/session/LoginFlow.java
index 11d58c4a1..2caaa6de8 100644
--- a/core/src/main/java/google/registry/flows/session/LoginFlow.java
+++ b/core/src/main/java/google/registry/flows/session/LoginFlow.java
@@ -15,6 +15,7 @@
 package google.registry.flows.session;
 
 import static com.google.common.collect.Sets.difference;
+import static google.registry.model.common.FeatureFlag.FeatureName.PROHIBIT_CONTACT_OBJECTS_ON_LOGIN;
 import static google.registry.persistence.transaction.TransactionManagerFactory.tm;
 import static google.registry.util.CollectionUtils.nullToEmpty;
 
@@ -39,6 +40,7 @@ import google.registry.flows.TlsCredentials.BadRegistrarIpAddressException;
 import google.registry.flows.TlsCredentials.MissingRegistrarCertificateException;
 import google.registry.flows.TransportCredentials;
 import google.registry.flows.TransportCredentials.BadRegistrarPasswordException;
+import google.registry.model.common.FeatureFlag;
 import google.registry.model.eppcommon.ProtocolDefinition;
 import google.registry.model.eppcommon.ProtocolDefinition.ServiceExtension;
 import google.registry.model.eppinput.EppInput;
@@ -114,9 +116,13 @@ public class LoginFlow implements MutatingFlow {
     }
     Services services = login.getServices();
     stopwatch.tick("LoginFlow getServices");
-    Set<String> unsupportedObjectServices = difference(
-        nullToEmpty(services.getObjectServices()),
-        ProtocolDefinition.SUPPORTED_OBJECT_SERVICES);
+
+    Set<String> unsupportedObjectServices =
+        difference(
+            nullToEmpty(services.getObjectServices()),
+            FeatureFlag.isActiveNow(PROHIBIT_CONTACT_OBJECTS_ON_LOGIN)
+                ? ProtocolDefinition.SUPPORTED_OBJECT_SERVICES
+                : ProtocolDefinition.SUPPORTED_OBJECT_SERVICES_WITH_CONTACT);
     stopwatch.tick("LoginFlow difference unsupportedObjectServices");
     if (!unsupportedObjectServices.isEmpty()) {
       throw new UnimplementedObjectServiceException();
diff --git a/core/src/main/java/google/registry/model/common/FeatureFlag.java b/core/src/main/java/google/registry/model/common/FeatureFlag.java
index 3c96e820b..efaa8bee7 100644
--- a/core/src/main/java/google/registry/model/common/FeatureFlag.java
+++ b/core/src/main/java/google/registry/model/common/FeatureFlag.java
@@ -64,6 +64,7 @@ public class FeatureFlag extends ImmutableObject implements Buildable {
 
   /** The names of the feature flags that can be individually set. */
   public enum FeatureName {
+
     /** Feature flag name used for testing only. */
     TEST_FEATURE(FeatureStatus.INACTIVE),
 
@@ -76,7 +77,10 @@ public class FeatureFlag extends ImmutableObject implements Buildable {
     /**
      * If we're including the upcoming domain drop date in the exported list of registered domains.
      */
-    INCLUDE_PENDING_DELETE_DATE_FOR_DOMAINS(FeatureStatus.INACTIVE);
+    INCLUDE_PENDING_DELETE_DATE_FOR_DOMAINS(FeatureStatus.INACTIVE),
+
+    /** If we're prohibiting the inclusion of the contact object URI on login. */
+    PROHIBIT_CONTACT_OBJECTS_ON_LOGIN(FeatureStatus.INACTIVE);
 
     private final FeatureStatus defaultStatus;
 
diff --git a/core/src/main/java/google/registry/model/eppcommon/ProtocolDefinition.java b/core/src/main/java/google/registry/model/eppcommon/ProtocolDefinition.java
index 1e6d8f1c5..bdc8a146b 100644
--- a/core/src/main/java/google/registry/model/eppcommon/ProtocolDefinition.java
+++ b/core/src/main/java/google/registry/model/eppcommon/ProtocolDefinition.java
@@ -46,10 +46,13 @@ public class ProtocolDefinition {
   public static final String LANGUAGE = "en";
 
   public static final ImmutableSet<String> SUPPORTED_OBJECT_SERVICES =
-      ImmutableSet.of(
-          "urn:ietf:params:xml:ns:host-1.0",
-          "urn:ietf:params:xml:ns:domain-1.0",
-          "urn:ietf:params:xml:ns:contact-1.0");
+      ImmutableSet.of("urn:ietf:params:xml:ns:host-1.0", "urn:ietf:params:xml:ns:domain-1.0");
+
+  public static final ImmutableSet<String> SUPPORTED_OBJECT_SERVICES_WITH_CONTACT =
+      new ImmutableSet.Builder<String>()
+          .addAll(SUPPORTED_OBJECT_SERVICES)
+          .add("urn:ietf:params:xml:ns:contact-1.0")
+          .build();
 
   /** Enum representing which environments should have which service extensions enabled. */
   private enum ServiceExtensionVisibility {
diff --git a/core/src/test/java/google/registry/flows/domain/DomainCheckFlowTest.java b/core/src/test/java/google/registry/flows/domain/DomainCheckFlowTest.java
index 295903ff3..ef3a6e514 100644
--- a/core/src/test/java/google/registry/flows/domain/DomainCheckFlowTest.java
+++ b/core/src/test/java/google/registry/flows/domain/DomainCheckFlowTest.java
@@ -1151,7 +1151,6 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
         .marshalsToXml();
   }
 
-
   @Test
   void testSuccess_eapFeeCheck_std_v1() throws Exception {
     runEapFeeCheckTestWithXmlInputOutput(
diff --git a/core/src/test/java/google/registry/flows/session/LoginFlowTestCase.java b/core/src/test/java/google/registry/flows/session/LoginFlowTestCase.java
index 772b43bff..aaec90ea6 100644
--- a/core/src/test/java/google/registry/flows/session/LoginFlowTestCase.java
+++ b/core/src/test/java/google/registry/flows/session/LoginFlowTestCase.java
@@ -16,14 +16,17 @@ package google.registry.flows.session;
 
 import static com.google.common.io.BaseEncoding.base64;
 import static com.google.common.truth.Truth.assertThat;
+import static google.registry.model.common.FeatureFlag.FeatureName.PROHIBIT_CONTACT_OBJECTS_ON_LOGIN;
 import static google.registry.persistence.transaction.TransactionManagerFactory.tm;
 import static google.registry.testing.DatabaseHelper.deleteResource;
 import static google.registry.testing.DatabaseHelper.loadRegistrar;
 import static google.registry.testing.DatabaseHelper.persistResource;
 import static google.registry.testing.EppExceptionSubject.assertAboutEppExceptions;
+import static google.registry.util.DateTimeUtils.START_OF_TIME;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSortedMap;
 import google.registry.flows.EppException;
 import google.registry.flows.EppException.UnimplementedExtensionException;
 import google.registry.flows.EppException.UnimplementedObjectServiceException;
@@ -36,6 +39,8 @@ import google.registry.flows.session.LoginFlow.BadRegistrarIdException;
 import google.registry.flows.session.LoginFlow.RegistrarAccountNotActiveException;
 import google.registry.flows.session.LoginFlow.TooManyFailedLoginsException;
 import google.registry.flows.session.LoginFlow.UnsupportedLanguageException;
+import google.registry.model.common.FeatureFlag;
+import google.registry.model.common.FeatureFlag.FeatureStatus;
 import google.registry.model.eppoutput.EppOutput;
 import google.registry.model.registrar.Registrar;
 import google.registry.model.registrar.Registrar.State;
@@ -56,6 +61,11 @@ public abstract class LoginFlowTestCase extends FlowTestCase<LoginFlow> {
     sessionMetadata.setRegistrarId(null); // Don't implicitly log in (all other flows need to).
     registrar = loadRegistrar("NewRegistrar");
     registrarBuilder = registrar.asBuilder();
+    persistResource(
+        new FeatureFlag.Builder()
+            .setFeatureName(PROHIBIT_CONTACT_OBJECTS_ON_LOGIN)
+            .setStatusMap(ImmutableSortedMap.of(START_OF_TIME, FeatureStatus.ACTIVE))
+            .build());
   }
 
   // Can't inline this since it may be overridden in subclasses.
@@ -117,6 +127,21 @@ public abstract class LoginFlowTestCase extends FlowTestCase<LoginFlow> {
     doFailingTest("login_invalid_extension.xml", UnimplementedExtensionException.class);
   }
 
+  @Test
+  void testFailure_invalidContactObjectUri() {
+    doFailingTest("login_with_contact_objuri.xml", UnimplementedObjectServiceException.class);
+  }
+
+  @Test
+  void testSuccess_contactObjectUri_worksWhenNotProhibited() throws Exception {
+    persistResource(
+        FeatureFlag.get(PROHIBIT_CONTACT_OBJECTS_ON_LOGIN)
+            .asBuilder()
+            .setStatusMap(ImmutableSortedMap.of(START_OF_TIME, FeatureStatus.INACTIVE))
+            .build());
+    doSuccessfulTest("login_with_contact_objuri.xml");
+  }
+
   @Test
   void testFailure_invalidTypes() {
     doFailingTest("login_invalid_types.xml", UnimplementedObjectServiceException.class);
diff --git a/core/src/test/java/google/registry/model/eppinput/EppInputTest.java b/core/src/test/java/google/registry/model/eppinput/EppInputTest.java
index 68d824fdd..43da2566a 100644
--- a/core/src/test/java/google/registry/model/eppinput/EppInputTest.java
+++ b/core/src/test/java/google/registry/model/eppinput/EppInputTest.java
@@ -68,10 +68,7 @@ class EppInputTest {
     assertThat(loginCommand.options.version).isEqualTo("1.0");
     assertThat(loginCommand.options.language).isEqualTo("en");
     assertThat(loginCommand.services.objectServices)
-        .containsExactly(
-            "urn:ietf:params:xml:ns:host-1.0",
-            "urn:ietf:params:xml:ns:domain-1.0",
-            "urn:ietf:params:xml:ns:contact-1.0");
+        .containsExactly("urn:ietf:params:xml:ns:host-1.0", "urn:ietf:params:xml:ns:domain-1.0");
     assertThat(loginCommand.services.serviceExtensions)
         .containsExactly("urn:ietf:params:xml:ns:launch-1.0", "urn:ietf:params:xml:ns:rgp-1.0");
   }
diff --git a/core/src/test/resources/google/registry/flows/greeting.xml b/core/src/test/resources/google/registry/flows/greeting.xml
index f039bfca7..4482b7f27 100644
--- a/core/src/test/resources/google/registry/flows/greeting.xml
+++ b/core/src/test/resources/google/registry/flows/greeting.xml
@@ -6,7 +6,6 @@
       <version>1.0</version>
       <lang>en</lang>
       <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
-      <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
       <svcExtension>
         <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/flows/login.xml b/core/src/test/resources/google/registry/flows/login.xml
index 00dd038af..922f68ca6 100644
--- a/core/src/test/resources/google/registry/flows/login.xml
+++ b/core/src/test/resources/google/registry/flows/login.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/flows/login_update_password.xml b/core/src/test/resources/google/registry/flows/login_update_password.xml
index 07011f4e9..dc832cf97 100644
--- a/core/src/test/resources/google/registry/flows/login_update_password.xml
+++ b/core/src/test/resources/google/registry/flows/login_update_password.xml
@@ -11,7 +11,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/flows/login_valid_fee_extension.xml b/core/src/test/resources/google/registry/flows/login_valid_fee_extension.xml
index c84fc3279..f46647f74 100644
--- a/core/src/test/resources/google/registry/flows/login_valid_fee_extension.xml
+++ b/core/src/test/resources/google/registry/flows/login_valid_fee_extension.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/flows/login_wrong_case.xml b/core/src/test/resources/google/registry/flows/login_wrong_case.xml
index c0c8716a1..514909845 100644
--- a/core/src/test/resources/google/registry/flows/login_wrong_case.xml
+++ b/core/src/test/resources/google/registry/flows/login_wrong_case.xml
@@ -11,7 +11,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/flows/session/greeting.xml b/core/src/test/resources/google/registry/flows/session/greeting.xml
index f039bfca7..4482b7f27 100644
--- a/core/src/test/resources/google/registry/flows/session/greeting.xml
+++ b/core/src/test/resources/google/registry/flows/session/greeting.xml
@@ -6,7 +6,6 @@
       <version>1.0</version>
       <lang>en</lang>
       <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
-      <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
       <svcExtension>
         <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/flows/session/login_invalid_extension.xml b/core/src/test/resources/google/registry/flows/session/login_invalid_extension.xml
index 45d022c24..40fd1d3de 100644
--- a/core/src/test/resources/google/registry/flows/session/login_invalid_extension.xml
+++ b/core/src/test/resources/google/registry/flows/session/login_invalid_extension.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>http://custom/obj1ext-1.0</extURI>
         </svcExtension>
diff --git a/core/src/test/resources/google/registry/flows/session/login_invalid_language.xml b/core/src/test/resources/google/registry/flows/session/login_invalid_language.xml
index 8e4a2290a..8324b1cb2 100644
--- a/core/src/test/resources/google/registry/flows/session/login_invalid_language.xml
+++ b/core/src/test/resources/google/registry/flows/session/login_invalid_language.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>
diff --git a/core/src/test/resources/google/registry/flows/session/login_invalid_types.xml b/core/src/test/resources/google/registry/flows/session/login_invalid_types.xml
index 480ead567..a3625b3ef 100644
--- a/core/src/test/resources/google/registry/flows/session/login_invalid_types.xml
+++ b/core/src/test/resources/google/registry/flows/session/login_invalid_types.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:foo-1.0</objURI>
       </svcs>
     </login>
diff --git a/core/src/test/resources/google/registry/flows/session/login_invalid_version.xml b/core/src/test/resources/google/registry/flows/session/login_invalid_version.xml
index 3469a5f79..2ce50ce3a 100644
--- a/core/src/test/resources/google/registry/flows/session/login_invalid_version.xml
+++ b/core/src/test/resources/google/registry/flows/session/login_invalid_version.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>
diff --git a/core/src/test/resources/google/registry/flows/session/login_set_new_password.xml b/core/src/test/resources/google/registry/flows/session/login_set_new_password.xml
index 2fd6ba91c..eedc98b09 100644
--- a/core/src/test/resources/google/registry/flows/session/login_set_new_password.xml
+++ b/core/src/test/resources/google/registry/flows/session/login_set_new_password.xml
@@ -11,7 +11,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>
diff --git a/core/src/test/resources/google/registry/flows/session/login_valid.xml b/core/src/test/resources/google/registry/flows/session/login_valid.xml
index 210c07aa3..a854beb05 100644
--- a/core/src/test/resources/google/registry/flows/session/login_valid.xml
+++ b/core/src/test/resources/google/registry/flows/session/login_valid.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>
diff --git a/core/src/test/resources/google/registry/flows/session/login_with_contact_objuri.xml b/core/src/test/resources/google/registry/flows/session/login_with_contact_objuri.xml
new file mode 100644
index 000000000..210c07aa3
--- /dev/null
+++ b/core/src/test/resources/google/registry/flows/session/login_with_contact_objuri.xml
@@ -0,0 +1,18 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <login>
+      <clID>NewRegistrar</clID>
+      <pw>foo-BAR2</pw>
+      <options>
+        <version>1.0</version>
+        <lang>en</lang>
+      </options>
+      <svcs>
+        <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
+        <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
+        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
+      </svcs>
+    </login>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>
diff --git a/core/src/test/resources/google/registry/flows/syntax_error.xml b/core/src/test/resources/google/registry/flows/syntax_error.xml
index b25f3360e..858dde672 100644
--- a/core/src/test/resources/google/registry/flows/syntax_error.xml
+++ b/core/src/test/resources/google/registry/flows/syntax_error.xml
@@ -12,7 +12,6 @@ xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd">
       </options>
       <svcs>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:secDNS-1.1</extURI>
diff --git a/core/src/test/resources/google/registry/model/eppinput/login_valid.xml b/core/src/test/resources/google/registry/model/eppinput/login_valid.xml
index 9844b2f7a..cbd3f8897 100644
--- a/core/src/test/resources/google/registry/model/eppinput/login_valid.xml
+++ b/core/src/test/resources/google/registry/model/eppinput/login_valid.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>
diff --git a/core/src/test/resources/google/registry/model/eppinput/login_wrong_case.xml b/core/src/test/resources/google/registry/model/eppinput/login_wrong_case.xml
index c445ab412..6b36afa25 100644
--- a/core/src/test/resources/google/registry/model/eppinput/login_wrong_case.xml
+++ b/core/src/test/resources/google/registry/model/eppinput/login_wrong_case.xml
@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>
diff --git a/db/src/main/resources/sql/schema/db-schema.sql.generated b/db/src/main/resources/sql/schema/db-schema.sql.generated
index b2110ff2b..b75a1d74e 100644
--- a/db/src/main/resources/sql/schema/db-schema.sql.generated
+++ b/db/src/main/resources/sql/schema/db-schema.sql.generated
@@ -467,7 +467,7 @@
     );
 
     create table "FeatureFlag" (
-        feature_name text not null check (feature_name in ('TEST_FEATURE','MINIMUM_DATASET_CONTACTS_OPTIONAL','MINIMUM_DATASET_CONTACTS_PROHIBITED','INCLUDE_PENDING_DELETE_DATE_FOR_DOMAINS')),
+        feature_name text not null check (feature_name in ('TEST_FEATURE','MINIMUM_DATASET_CONTACTS_OPTIONAL','MINIMUM_DATASET_CONTACTS_PROHIBITED','INCLUDE_PENDING_DELETE_DATE_FOR_DOMAINS','PROHIBIT_CONTACT_OBJECTS_ON_LOGIN')),
         status hstore not null,
         primary key (feature_name)
     );
diff --git a/load-testing/src/main/java/google/registry/client/resources/login.xml b/load-testing/src/main/java/google/registry/client/resources/login.xml
index 4ff8ac658..e8bb28637 100644
--- a/load-testing/src/main/java/google/registry/client/resources/login.xml
+++ b/load-testing/src/main/java/google/registry/client/resources/login.xml
@@ -11,7 +11,6 @@
     <svcs>
       <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-      <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
     </svcs>
   </login>
   <clTRID>epp-client-login-@@NOW@@-@@CHANNEL_NUMBER@@</clTRID>
diff --git a/prober/src/main/resources/google/registry/monitoring/blackbox/message/greeting.xml b/prober/src/main/resources/google/registry/monitoring/blackbox/message/greeting.xml
index 076112cbd..b87890c14 100644
--- a/prober/src/main/resources/google/registry/monitoring/blackbox/message/greeting.xml
+++ b/prober/src/main/resources/google/registry/monitoring/blackbox/message/greeting.xml
@@ -5,7 +5,6 @@
     <svcMenu>
       <version>1.0</version>
       <lang>en</lang>
-      <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
     </svcMenu>
diff --git a/prober/src/main/resources/google/registry/monitoring/blackbox/message/login.xml b/prober/src/main/resources/google/registry/monitoring/blackbox/message/login.xml
index b4c72cd61..a0e87ff54 100644
--- a/prober/src/main/resources/google/registry/monitoring/blackbox/message/login.xml
+++ b/prober/src/main/resources/google/registry/monitoring/blackbox/message/login.xml
@@ -10,7 +10,6 @@
       </options>
       <svcs>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>