diff --git a/src/main/java/org/sadtech/example/springvalidation/controller/PersonControllerGroupValid.java b/src/main/java/org/sadtech/example/springvalidation/controller/PersonControllerGroupValid.java
new file mode 100644
index 0000000..12b2256
--- /dev/null
+++ b/src/main/java/org/sadtech/example/springvalidation/controller/PersonControllerGroupValid.java
@@ -0,0 +1,33 @@
+package org.sadtech.example.springvalidation.controller;
+
+import org.sadtech.example.springvalidation.dto.PersonDto;
+import org.sadtech.example.springvalidation.valid.Marker;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.validation.Valid;
+import javax.validation.groups.Default;
+
+@Validated
+@RestController
+@RequestMapping("/api/group-valid/person")
+public class PersonControllerGroupValid {
+
+    @PostMapping
+    @Validated({Marker.OnCreate.class})
+    public ResponseEntity<String> create(@RequestBody @Valid PersonDto personDto) {
+        return ResponseEntity.ok("valid");
+    }
+
+    @PutMapping
+    @Validated(Marker.OnUpdate.class)
+    public ResponseEntity<String> update(@RequestBody @Valid PersonDto personDto) {
+        return ResponseEntity.ok("valid");
+    }
+
+}
diff --git a/src/main/java/org/sadtech/example/springvalidation/dto/PersonDto.java b/src/main/java/org/sadtech/example/springvalidation/dto/PersonDto.java
index b3534e6..5a9d5cd 100644
--- a/src/main/java/org/sadtech/example/springvalidation/dto/PersonDto.java
+++ b/src/main/java/org/sadtech/example/springvalidation/dto/PersonDto.java
@@ -3,6 +3,7 @@ package org.sadtech.example.springvalidation.dto;
 import lombok.Getter;
 import lombok.Setter;
 import org.sadtech.example.springvalidation.valid.CapitalLetter;
+import org.sadtech.example.springvalidation.valid.Marker;
 
 import javax.persistence.Column;
 import javax.persistence.Entity;
@@ -10,10 +11,11 @@ import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.Table;
-import javax.persistence.Transient;
 import javax.validation.constraints.Max;
 import javax.validation.constraints.Min;
 import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Null;
 import javax.validation.constraints.Pattern;
 
 @Entity
@@ -23,6 +25,8 @@ import javax.validation.constraints.Pattern;
 public class PersonDto {
 
     @Id
+    @Null(groups = Marker.OnCreate.class)
+    @NotNull(groups = Marker.OnUpdate.class)
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
diff --git a/src/main/java/org/sadtech/example/springvalidation/valid/Marker.java b/src/main/java/org/sadtech/example/springvalidation/valid/Marker.java
new file mode 100644
index 0000000..2c5c2ac
--- /dev/null
+++ b/src/main/java/org/sadtech/example/springvalidation/valid/Marker.java
@@ -0,0 +1,9 @@
+package org.sadtech.example.springvalidation.valid;
+
+public interface Marker {
+
+    interface OnCreate {}
+
+    interface OnUpdate {}
+
+}