diff --git a/lib/taskana-core/src/main/java/pro/taskana/TaskanaEngineConfiguration.java b/lib/taskana-core/src/main/java/pro/taskana/TaskanaEngineConfiguration.java
index d952d7623..96e04fd6b 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/TaskanaEngineConfiguration.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/TaskanaEngineConfiguration.java
@@ -74,6 +74,8 @@ public class TaskanaEngineConfiguration {
   private static final String TASKANA_CUSTOM_HOLIDAY_DAY_MONTH_SEPARATOR = ".";
   private static final String TASKANA_HISTORY_DELETION_ON_TASK_DELETION_ENABLED =
       "taskana.history.deletion.on.task.deletion.enabled";
+  private static final String TASKANA_VALIDATION_ALLOW_TIMESTAMP_SERVICE_LEVEL_MISMATCH =
+      "taskana.validation.allowTimestampServiceLevelMismatch";
   // TASKANA_SCHEMA_VERSION
   private static final String DEFAULT_SCHEMA_NAME = "TASKANA";
 
@@ -107,6 +109,7 @@ public class TaskanaEngineConfiguration {
   private Duration cleanupJobRunEvery = Duration.parse("P1D");
   private Duration cleanupJobMinimumAge = Duration.parse("P14D");
   private boolean taskCleanupJobAllCompletedSameParentBusiness = true;
+  private boolean validationAllowTimestampServiceLevelMismatch = false;
 
   private int priorityJobBatchSize = 100;
   private Instant priorityJobFirstRun = Instant.parse("2018-01-01T00:00:00Z");
@@ -174,6 +177,10 @@ public class TaskanaEngineConfiguration {
         props,
         TASKANA_HISTORY_DELETION_ON_TASK_DELETION_ENABLED,
         this::setDeleteHistoryOnTaskDeletionEnabled);
+    initBooleanProperty(
+        props,
+        TASKANA_VALIDATION_ALLOW_TIMESTAMP_SERVICE_LEVEL_MISMATCH,
+        this::setValidationAllowTimestampServiceLevelMismatch);
     initCustomHolidays(props, separator);
   }
 
@@ -262,6 +269,16 @@ public class TaskanaEngineConfiguration {
     this.germanPublicHolidaysEnabled = germanPublicHolidaysEnabled;
   }
 
+  public boolean isValidationAllowTimestampServiceLevelMismatch() {
+    return validationAllowTimestampServiceLevelMismatch;
+  }
+
+  public void setValidationAllowTimestampServiceLevelMismatch(
+      boolean validationAllowTimestampServiceLevelMismatch) {
+    this.validationAllowTimestampServiceLevelMismatch =
+        validationAllowTimestampServiceLevelMismatch;
+  }
+
   public boolean isDeleteHistoryOnTaskDeletionEnabled() {
     return deleteHistoryOnTaskDeletionEnabled;
   }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/task/internal/ServiceLevelHandler.java b/lib/taskana-core/src/main/java/pro/taskana/task/internal/ServiceLevelHandler.java
index 5d05fc5c6..587eb67a8 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/task/internal/ServiceLevelHandler.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/task/internal/ServiceLevelHandler.java
@@ -243,6 +243,15 @@ class ServiceLevelHandler {
   private TaskImpl updatePlannedDueOnTaskUpdate(
       TaskImpl newTaskImpl, TaskImpl oldTaskImpl, DurationPrioHolder durationPrioHolder)
       throws InvalidArgumentException {
+    if (taskanaEngine
+            .getEngine()
+            .getConfiguration()
+            .isValidationAllowTimestampServiceLevelMismatch()
+        && newTaskImpl.getDue() != null
+        && newTaskImpl.getPlanned() != null) {
+
+      return newTaskImpl;
+    }
     if (newTaskImpl.getPlanned() == null && newTaskImpl.getDue() == null) {
       newTaskImpl.setPlanned(oldTaskImpl.getPlanned());
     }
@@ -325,6 +334,14 @@ class ServiceLevelHandler {
 
   private TaskImpl updatePlannedDueOnCreationOfNewTask(
       TaskImpl newTask, DurationPrioHolder durationPrioHolder) throws InvalidArgumentException {
+    if (taskanaEngine
+            .getEngine()
+            .getConfiguration()
+            .isValidationAllowTimestampServiceLevelMismatch()
+        && newTask.getDue() != null
+        && newTask.getPlanned() != null) {
+      return newTask;
+    }
     if (newTask.getDue() != null) {
       // due is specified: calculate back and check correctness
       Instant calcDue = getPrecedingWorkingDays(newTask.getDue(), Duration.ofDays(0));
diff --git a/lib/taskana-core/src/test/java/acceptance/task/CreateTaskAccTest.java b/lib/taskana-core/src/test/java/acceptance/task/CreateTaskAccTest.java
index e84d7997b..ab10f53b6 100644
--- a/lib/taskana-core/src/test/java/acceptance/task/CreateTaskAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/task/CreateTaskAccTest.java
@@ -100,6 +100,57 @@ class CreateTaskAccTest extends AbstractAccTest {
     assertThat(createdTask.isTransferred()).isFalse();
   }
 
+  @WithAccessId(user = "user-1-1")
+  @Test
+  void should_PreventTimestampServiceLevelMismatch_When_ConfigurationPreventsIt() {
+    // Given
+    Task newTask = taskService.newTask("USER-1-1", "DOMAIN_A");
+    newTask.setClassificationKey("T6310");
+    ObjectReference objectReference =
+        createObjectReference("COMPANY_A", "SYSTEM_A", "INSTANCE_A", "VNR", "1234567");
+    newTask.setPrimaryObjRef(objectReference);
+    newTask.setOwner("user-1-1");
+
+    // When
+    Instant planned = Instant.parse("2018-01-02T00:00:00Z");
+    newTask.setPlanned(planned);
+    Instant due = Instant.parse("2018-02-15T00:00:00Z");
+    newTask.setDue(due);
+
+    // Then
+    assertThatThrownBy(() -> taskService.createTask(newTask))
+        .isInstanceOf(InvalidArgumentException.class)
+        .hasMessageContaining("not matching the service level");
+  }
+
+  @WithAccessId(user = "user-1-1")
+  @Test
+  void should_AllowTimestampServiceLevelMismatch_When_ConfigurationAllowsIt() throws Exception {
+    // Given
+    try {
+      taskanaEngineConfiguration.setValidationAllowTimestampServiceLevelMismatch(true);
+      Task newTask = taskService.newTask("USER-1-1", "DOMAIN_A");
+      newTask.setClassificationKey("T6310");
+      ObjectReference objectReference =
+          createObjectReference("COMPANY_A", "SYSTEM_A", "INSTANCE_A", "VNR", "1234567");
+      newTask.setPrimaryObjRef(objectReference);
+      newTask.setOwner("user-1-1");
+
+      // When
+      Instant planned = Instant.parse("2018-01-02T00:00:00Z");
+      newTask.setPlanned(planned);
+      Instant due = Instant.parse("2018-02-15T00:00:00Z");
+      newTask.setDue(due);
+      Task createdTask = taskService.createTask(newTask);
+
+      // Then
+      assertThat(createdTask.getPlanned()).isEqualTo(planned);
+      assertThat(createdTask.getDue()).isEqualTo(due);
+    } finally {
+      taskanaEngineConfiguration.setValidationAllowTimestampServiceLevelMismatch(false);
+    }
+  }
+
   @WithAccessId(user = "user-1-1")
   @Test
   void should_CreateTask_When_ObjectReferenceSystemAndSystemInstanceIsNull() throws Exception {
diff --git a/lib/taskana-core/src/test/java/acceptance/task/UpdateTaskAccTest.java b/lib/taskana-core/src/test/java/acceptance/task/UpdateTaskAccTest.java
index cea3c46e6..8db012522 100644
--- a/lib/taskana-core/src/test/java/acceptance/task/UpdateTaskAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/task/UpdateTaskAccTest.java
@@ -68,6 +68,48 @@ class UpdateTaskAccTest extends AbstractAccTest {
     assertThat(updatedTask.getParentBusinessProcessId()).isEqualTo("MY_PARENT_PROCESS_ID");
   }
 
+  @WithAccessId(user = "user-1-1")
+  @Test
+  void should_PreventTimestampServiceLevelMismatch_When_ConfigurationPreventsIt() throws Exception {
+    // Given
+
+    taskanaEngineConfiguration.setValidationAllowTimestampServiceLevelMismatch(false);
+    Task task = taskService.getTask("TKI:000000000000000000000000000000000000");
+    // When
+    Instant planned = Instant.parse("2018-03-02T00:00:00Z");
+    task.setPlanned(planned);
+    Instant due = Instant.parse("2018-04-15T00:00:00Z");
+    task.setDue(due);
+
+    // Then
+    assertThatThrownBy(() -> taskService.updateTask(task))
+        .isInstanceOf(InvalidArgumentException.class)
+        .hasMessageContaining("not matching the service level");
+  }
+
+  @WithAccessId(user = "user-1-1")
+  @Test
+  void should_AllowTimestampServiceLevelMismatch_When_ConfigurationAllowsIt() throws Exception {
+    try {
+      // Given
+      taskanaEngineConfiguration.setValidationAllowTimestampServiceLevelMismatch(true);
+      Task task = taskService.getTask("TKI:000000000000000000000000000000000000");
+
+      // When
+      Instant planned = Instant.parse("2018-01-02T00:00:00Z");
+      task.setPlanned(planned);
+      Instant due = Instant.parse("2018-02-15T00:00:00Z");
+      task.setDue(due);
+      Task updateTask = taskService.updateTask(task);
+
+      // Then
+      assertThat(updateTask.getPlanned()).isEqualTo(planned);
+      assertThat(updateTask.getDue()).isEqualTo(due);
+    } finally {
+      taskanaEngineConfiguration.setValidationAllowTimestampServiceLevelMismatch(false);
+    }
+  }
+
   @WithAccessId(user = "user-1-1")
   @Test
   void should_UpdatePrimaryObjectReferenceOfTask_When_ObjectreferenceSystemAndSystemInstanceIsNull()
diff --git a/lib/taskana-core/src/test/resources/taskana.properties b/lib/taskana-core/src/test/resources/taskana.properties
index 05a50d862..5b0040671 100644
--- a/lib/taskana-core/src/test/resources/taskana.properties
+++ b/lib/taskana-core/src/test/resources/taskana.properties
@@ -15,5 +15,5 @@ taskana.jobs.cleanup.minimumAge=P14D
 taskana.german.holidays.enabled=true
 taskana.german.holidays.corpus-christi.enabled=false
 taskana.history.deletion.on.task.deletion.enabled=true
-
+taskana.validation.allowTimestampServiceLevelMismatch=false