diff --git a/cust-services/src/main/java/de/hsadmin/bo/customer/MemberShare.java b/cust-services/src/main/java/de/hsadmin/bo/customer/MemberShare.java
index 73d0d12..20df8a1 100644
--- a/cust-services/src/main/java/de/hsadmin/bo/customer/MemberShare.java
+++ b/cust-services/src/main/java/de/hsadmin/bo/customer/MemberShare.java
@@ -93,7 +93,7 @@ public class MemberShare implements Serializable {
 	
 	@Override
 	public String toString() {
-		return "MemberShare [id=" + id + ", customer=" + customer.getName() + ", date=" + date + ", action=" + action
+		return "MemberShare [id=" + id + ", customer=" + (customer!=null ? customer.getName() : null) + ", date=" + date + ", action=" + action
 				+ ", quantity=" + quantity + ", comment=" + comment + "]";
 	}
 }
diff --git a/cust-services/src/main/java/de/hsadmin/service/customer/MemberShareVO.java b/cust-services/src/main/java/de/hsadmin/service/customer/MemberShareVO.java
index d26abfb..c511716 100644
--- a/cust-services/src/main/java/de/hsadmin/service/customer/MemberShareVO.java
+++ b/cust-services/src/main/java/de/hsadmin/service/customer/MemberShareVO.java
@@ -10,7 +10,6 @@ import de.hsadmin.module.property.ReadWritePolicy;
 import de.hsadmin.module.property.Required;
 import de.hsadmin.module.property.Search;
 import de.hsadmin.module.property.SearchPolicy;
-import de.hsadmin.module.property.mapping.DefaultEnumParameterMapMapper;
 import de.hsadmin.module.property.mapping.DefaultEnumPersistentObjectMapper;
 import de.hsadmin.module.property.mapping.DefaultStringParameterMapMapper;
 import de.hsadmin.module.property.mapping.Mapping;
@@ -27,7 +26,7 @@ public class MemberShareVO extends AbstractVO implements ValueObject {
 	private String customer;
 
 	@Mapping(boMapping=DefaultEnumPersistentObjectMapper.class, 
-			rpcMapping=DefaultEnumParameterMapMapper.class, 
+			rpcMapping=DefaultStringParameterMapMapper.class, 
 			boMappingPath="customer.name")
 	@ReadWrite(ReadWritePolicy.WRITEONCE)
 	@Required(true)
diff --git a/cust-services/src/test/java/de/hsadmin/service/customer/MemberShareVOTest.java b/cust-services/src/test/java/de/hsadmin/service/customer/MemberShareVOTest.java
index 360f8b6..bcbd10a 100644
--- a/cust-services/src/test/java/de/hsadmin/service/customer/MemberShareVOTest.java
+++ b/cust-services/src/test/java/de/hsadmin/service/customer/MemberShareVOTest.java
@@ -1,21 +1,20 @@
 package de.hsadmin.service.customer;
 
+import static junitparams.JUnitParamsRunner.$;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
-import org.h2.command.ddl.CreateAggregate;
-
-import static junitparams.JUnitParamsRunner.$;
-
 import org.joda.time.LocalDate;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.junit.runner.RunWith;
 
-
+import de.hsadmin.bo.customer.MemberShare;
+import de.hsadmin.bo.customer.MemberShareTest;
 import de.hsadmin.common.error.TechnicalException;
 import de.hsadmin.common.error.UserException;
+import de.hsadmin.dao.customer.CustomerDaoTest;
 import de.hsadmin.module.impl.ValidationDelegate;
 import de.hsadmin.module.property.Property;
 import junitparams.JUnitParamsRunner;
@@ -34,6 +33,8 @@ public class MemberShareVOTest {
 	
 	private static final int INITIAL_QUANTITY = 4;
 
+	private static final String INITIALIZED_MEMBER_SHARE_VO_AS_STRING = "MemberShareVO [customer=initCust, action=SUBSCRIPTION, date=Thu Dec 26 00:00:00 CET 1996, quantity=4, comment=initial comment]";
+
 	private final ValidationDelegate<MemberShareVO> validator = new ValidationDelegate<MemberShareVO>();
 	
 	@Rule
@@ -51,7 +52,35 @@ public class MemberShareVOTest {
 		// 	koennten auch andere Tests fehlschlagen.
 		// Wenn Felder aus dem toString() herausgenommen werden, 
 		// 	koennten sogar andere Tests stillschweigend wirkungslos werden!
-		assertEquals("MemberShareVO [customer=initCust, action=SUBSCRIPTION, date=Thu Dec 26 00:00:00 CET 1996, quantity=4, comment=initial comment]", vo.toString());
+		assertEquals(INITIALIZED_MEMBER_SHARE_VO_AS_STRING, vo.toString());
+	}
+	
+	@Test
+	public void copyPropertiesFromPersistentObject() throws TechnicalException, UserException {
+		// given
+		MemberShare bo = MemberShareTest.createNewMemberShare(CustomerDaoTest.createNewCustomer(10001, "testCust"));
+		
+		// when
+		MemberShareVO vo = new MemberShareVO();
+		vo.copyPropertiesFromPersistentObject(bo);
+		
+		// then
+		assertEquals("MemberShareVO [customer=testCust, action=SUBSCRIPTION, date=Thu Apr 13 00:00:00 CEST 2017, quantity=5, comment=test comment]", 
+				vo.toString());
+	}
+	
+	@Test
+	public void copyPropertiesToPersistentObject() throws TechnicalException, UserException {
+		// given
+		MemberShareVO vo = givenInitializedMemberShareVOForCustomer(INITIAL_CUSTOMER);
+		
+		// when
+		MemberShare bo = new MemberShare();
+		vo.copyPropertiesToPersistentObject(bo);
+		
+		// then (Achtung: customer muss vom Service umkopiert werden)
+		assertEquals("MemberShare [id=0, customer=null, date=Thu Dec 26 00:00:00 CET 1996, action=SUBSCRIPTION, quantity=4, comment=initial comment]", 
+				bo.toString());
 	}
 
 	// --- generic tests ---