diff --git a/services/src/main/java/de/hsadmin/service/customer/ContactVO.java b/services/src/main/java/de/hsadmin/service/customer/ContactVO.java
index b29562a..8336683 100644
--- a/services/src/main/java/de/hsadmin/service/customer/ContactVO.java
+++ b/services/src/main/java/de/hsadmin/service/customer/ContactVO.java
@@ -34,11 +34,13 @@ public class ContactVO extends AbstractVO implements ValueObject {
 	@Pattern(regexp="[\\p{L}\\p{Nd}\\-\\ ]*")
 	@ReadWrite(ReadWritePolicy.READWRITE)
 	@Search(SearchPolicy.LIKE)
+	@Required(true)
 	private String firstName;
 
 	@Pattern(regexp="[\\p{L}\\p{Nd}\\-\\ ]*")
 	@ReadWrite(ReadWritePolicy.READWRITE)
 	@Search(SearchPolicy.LIKE)
+	@Required(true)
 	private String lastName;
 
 	@Pattern(regexp="[\\p{L}\\p{Nd}\\-\\ ]*")