diff --git a/src/main/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcher.java b/src/main/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcher.java
index 092a0a9b..914c8230 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcher.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcher.java
@@ -1,5 +1,6 @@
 package net.hostsharing.hsadminng.hs.office.debitor;
 
+import net.hostsharing.hsadminng.hs.office.bankaccount.HsOfficeBankAccountEntity;
 import net.hostsharing.hsadminng.hs.office.contact.HsOfficeContactEntity;
 import net.hostsharing.hsadminng.hs.office.generated.api.v1.model.HsOfficeDebitorPatchResource;
 import net.hostsharing.hsadminng.mapper.EntityPatcher;
@@ -35,6 +36,10 @@ class HsOfficeDebitorEntityPatcher implements EntityPatcher<HsOfficeDebitorPatch
             verifyNotNull(newValue, "defaultPrefix");
             entity.setDefaultPrefix(newValue);
         });
+        OptionalFromJson.of(resource.getRefundBankAccountUuid()).ifPresent(newValue -> {
+            verifyNotNull(newValue, "refundBankAccount");
+            entity.setRefundBankAccount(em.getReference(HsOfficeBankAccountEntity.class, newValue));
+        });
     }
 
     private void verifyNotNull(final Object newValue, final String propertyName) {
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcherUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcherUnitTest.java
index d94e9323..1983df59 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcherUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntityPatcherUnitTest.java
@@ -1,5 +1,6 @@
 package net.hostsharing.hsadminng.hs.office.debitor;
 
+import net.hostsharing.hsadminng.hs.office.bankaccount.HsOfficeBankAccountEntity;
 import net.hostsharing.hsadminng.hs.office.contact.HsOfficeContactEntity;
 import net.hostsharing.hsadminng.hs.office.generated.api.v1.model.HsOfficeDebitorPatchResource;
 import net.hostsharing.hsadminng.hs.office.partner.HsOfficePartnerEntity;
@@ -42,6 +43,9 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
     private static final boolean INITIAL_VAT_REVERSE_CHARGE = true;
     private static final boolean PATCHED_VAT_REVERSE_CHARGE = false;
 
+    private static final UUID INITIAL_REFUND_BANK_ACCOUNT_UUID = UUID.randomUUID();
+    private static final UUID PATCHED_REFUND_BANK_ACCOUNT_UUID = UUID.randomUUID();
+
     private final HsOfficePartnerEntity givenInitialPartner = HsOfficePartnerEntity.builder()
             .uuid(INITIAL_PARTNER_UUID)
             .build();
@@ -49,6 +53,10 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
     private final HsOfficeContactEntity givenInitialContact = HsOfficeContactEntity.builder()
             .uuid(INITIAL_CONTACT_UUID)
             .build();
+
+    private final HsOfficeBankAccountEntity givenInitialBankAccount = HsOfficeBankAccountEntity.builder()
+            .uuid(INITIAL_REFUND_BANK_ACCOUNT_UUID)
+            .build();
     @Mock
     private EntityManager em;
 
@@ -56,8 +64,8 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
     void initMocks() {
         lenient().when(em.getReference(eq(HsOfficeContactEntity.class), any())).thenAnswer(invocation ->
                 HsOfficeContactEntity.builder().uuid(invocation.getArgument(1)).build());
-        lenient().when(em.getReference(eq(HsOfficeContactEntity.class), any())).thenAnswer(invocation ->
-                HsOfficeContactEntity.builder().uuid(invocation.getArgument(1)).build());
+        lenient().when(em.getReference(eq(HsOfficeBankAccountEntity.class), any())).thenAnswer(invocation ->
+                HsOfficeBankAccountEntity.builder().uuid(invocation.getArgument(1)).build());
     }
 
     @Override
@@ -72,6 +80,7 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
         entity.setVatBusiness(true);
         entity.setVatReverseCharge(INITIAL_VAT_REVERSE_CHARGE);
         entity.setDefaultPrefix("abc");
+        entity.setRefundBankAccount(givenInitialBankAccount);
         return entity;
     }
 
@@ -120,7 +129,7 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
                 new SimpleProperty<>(
                         "personType",
                         HsOfficeDebitorPatchResource::setVatBusiness,
-                        PATCHED_BILLABLE,
+                        PATCHED_VAT_BUSINESS,
                         HsOfficeDebitorEntity::setVatBusiness)
                         .notNullable(),
                 new SimpleProperty<>(
@@ -134,6 +143,13 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
                         HsOfficeDebitorPatchResource::setDefaultPrefix,
                         PATCHED_DEFAULT_PREFIX,
                         HsOfficeDebitorEntity::setDefaultPrefix)
+                        .notNullable(),
+                new JsonNullableProperty<>(
+                        "refundBankAccount",
+                        HsOfficeDebitorPatchResource::setRefundBankAccountUuid,
+                        PATCHED_REFUND_BANK_ACCOUNT_UUID,
+                        HsOfficeDebitorEntity::setRefundBankAccount,
+                        newBankAccount(PATCHED_REFUND_BANK_ACCOUNT_UUID))
                         .notNullable()
         );
     }
@@ -143,4 +159,10 @@ class HsOfficeDebitorEntityPatcherUnitTest extends PatchUnitTestBase<
         newContact.setUuid(uuid);
         return newContact;
     }
+
+    private HsOfficeBankAccountEntity newBankAccount(final UUID uuid) {
+        final var newBankAccount = new HsOfficeBankAccountEntity();
+        newBankAccount.setUuid(uuid);
+        return newBankAccount;
+    }
 }
diff --git a/src/test/java/net/hostsharing/test/PatchUnitTestBase.java b/src/test/java/net/hostsharing/test/PatchUnitTestBase.java
index 7be61b19..51f78bb4 100644
--- a/src/test/java/net/hostsharing/test/PatchUnitTestBase.java
+++ b/src/test/java/net/hostsharing/test/PatchUnitTestBase.java
@@ -1,5 +1,6 @@
 package net.hostsharing.test;
 
+import net.hostsharing.hsadminng.hs.office.migration.HasUuid;
 import net.hostsharing.hsadminng.mapper.EntityPatcher;
 import org.junit.jupiter.api.Named;
 import org.junit.jupiter.api.Test;
@@ -232,7 +233,7 @@ public abstract class PatchUnitTestBase<R, E> {
         }
     }
 
-    protected static class JsonNullableProperty<R, RV, E, EV> extends Property<R, RV, E, EV> {
+    protected static class JsonNullableProperty<R, RV, E extends HasUuid, EV> extends Property<R, RV, E, EV> {
 
         private final BiConsumer<R, JsonNullable<RV>> resourceSetter;
         public final RV givenPatchValue;