diff --git a/common/src/test/java/de/ozgcloud/eingang/common/formdata/FormDataTestFactory.java b/common/src/test/java/de/ozgcloud/eingang/common/formdata/FormDataTestFactory.java
index 8d23e2cb03b702eb1fb9fc3869e5eb750f72cd84..e496826bf677bb6bd3a9202f54095ce4a5140e75 100644
--- a/common/src/test/java/de/ozgcloud/eingang/common/formdata/FormDataTestFactory.java
+++ b/common/src/test/java/de/ozgcloud/eingang/common/formdata/FormDataTestFactory.java
@@ -61,7 +61,6 @@ public class FormDataTestFactory {
 		return FormData.builder()
 				.header(FormHeaderTestFactory.create())
 				.antragsteller(AntragstellerTestFactory.create())
-				.zustaendigeStelle(ZustaendigeStelleTestFactory.create())
 				.formData(Map.of(
 						SIMPLE_VALUE_KEY, SIMPLE_VALUE,
 						SUBFORM_KEY, SUBFORM_VALUE,
diff --git a/router/src/test/java/de/ozgcloud/eingang/router/GrpcEingangMapperITCase.java b/router/src/test/java/de/ozgcloud/eingang/router/GrpcEingangMapperITCase.java
index a85751ad5c91ece26902445644dd28fbb4c1f5a0..fbb17f294ffbe8a3e51012c16422c73334c12f1e 100644
--- a/router/src/test/java/de/ozgcloud/eingang/router/GrpcEingangMapperITCase.java
+++ b/router/src/test/java/de/ozgcloud/eingang/router/GrpcEingangMapperITCase.java
@@ -37,6 +37,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
 import de.ozgcloud.eingang.common.formdata.AntragstellerTestFactory;
+import de.ozgcloud.eingang.common.formdata.FormData;
 import de.ozgcloud.eingang.common.formdata.FormDataTestFactory;
 import de.ozgcloud.eingang.common.formdata.IncomingFileTestFactory;
 import de.ozgcloud.eingang.common.formdata.ZustaendigeStelleTestFactory;
@@ -49,6 +50,15 @@ class GrpcEingangMapperITCase {
 	@Autowired
 	private GrpcEingangMapper grpcEingangMapper;
 
+	private FormData inputFormData;
+
+	@BeforeEach
+	void mock() {
+		inputFormData = FormDataTestFactory.createBuilder()
+				.zustaendigeStelle(ZustaendigeStelleTestFactory.create())
+				.build();
+	}
+
 	@DisplayName("Mapped GrpcEingang")
 	@Nested
 	class TestToEingang {
@@ -59,8 +69,8 @@ class GrpcEingangMapperITCase {
 
 			@Test
 			void antragstellerShouldBeMapped() {
-
-				var antragSteller = grpcEingangMapper.toEingang(FormDataTestFactory.create(), Optional.of(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID)).getAntragsteller();
+				var antragSteller = grpcEingangMapper.toEingang(inputFormData,
+						Optional.of(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID)).getAntragsteller();
 
 				assertThat(antragSteller.getPostfachId()).isEqualTo(AntragstellerTestFactory.POSTFACH_ID);
 				assertThat(antragSteller.getVorname()).isEqualTo(AntragstellerTestFactory.VORNAME);
@@ -69,8 +79,8 @@ class GrpcEingangMapperITCase {
 
 			@Test
 			void dataShouldBeMapped() {
-
-				var antragsteller = grpcEingangMapper.toEingang(FormDataTestFactory.create(), Optional.of(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID)).getAntragsteller();
+				var antragsteller = grpcEingangMapper.toEingang(inputFormData,
+						Optional.of(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID)).getAntragsteller();
 
 				assertThat(antragsteller.getOtherData().getFieldList()).hasSize(1);
 				assertThat(antragsteller.getOtherData().getField(0).getName()).isEqualTo(AntragstellerTestFactory.GEBIET_BEZEICHNUNG_KEY);
@@ -83,7 +93,8 @@ class GrpcEingangMapperITCase {
 		class TestZustaendigeStelle {
 			@Test
 			void eingangShouldHaveZustaendigeStelle() {
-				var zustaendigeStelle = grpcEingangMapper.toEingang(FormDataTestFactory.create(), Optional.of(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID)).getZustaendigeStelle();
+				var zustaendigeStelle = grpcEingangMapper.toEingang(inputFormData, Optional.of(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID))
+						.getZustaendigeStelle();
 
 				assertThat(zustaendigeStelle).isNotNull();
 				assertThat(zustaendigeStelle.getOrganisationseinheitenId()).isEqualTo(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID);
@@ -93,7 +104,7 @@ class GrpcEingangMapperITCase {
 			@DisplayName("should map empty organisationeinheitId if missing")
 			@Test
 			void shouldMapEmptyOrganisationeinheitIdIfMissing() {
-				var zustaendigeStelle = grpcEingangMapper.toEingang(FormDataTestFactory.create(), Optional.empty()).getZustaendigeStelle();
+				var zustaendigeStelle = grpcEingangMapper.toEingang(inputFormData, Optional.empty()).getZustaendigeStelle();
 
 				assertThat(zustaendigeStelle).isNotNull();
 				assertThat(zustaendigeStelle.getOrganisationseinheitenId()).isEmpty();
@@ -109,7 +120,7 @@ class GrpcEingangMapperITCase {
 			@BeforeEach
 			void init() {
 
-				eingang = grpcEingangMapper.toEingang(FormDataTestFactory.create(), Optional.empty());
+				eingang = grpcEingangMapper.toEingang(inputFormData, Optional.empty());
 			}
 
 			@Test
@@ -189,7 +200,8 @@ class GrpcEingangMapperITCase {
 			void valueListShouldGenerateFields() {
 
 				GrpcEingang eingang = grpcEingangMapper
-						.toEingang(FormDataTestFactory.createBuilder().formData(Map.of("key", List.of("value1", "value2"))).build(), Optional.empty());
+						.toEingang(FormDataTestFactory.createBuilder().formData(Map.of("key", List.of("value1", "value2"))).build(),
+								Optional.empty());
 
 				assertThat(eingang.getFormData().getFieldCount()).isEqualTo(2);
 			}
@@ -199,7 +211,8 @@ class GrpcEingangMapperITCase {
 
 				GrpcEingang eingang = grpcEingangMapper
 						.toEingang(FormDataTestFactory.createBuilder()
-								.formData(Map.of("key-1", List.of(Map.of("sub_key", "value1"), Map.of("sub_key", "value2")))).build(), Optional.empty());
+										.formData(Map.of("key-1", List.of(Map.of("sub_key", "value1"), Map.of("sub_key", "value2")))).build(),
+								Optional.empty());
 
 				assertThat(eingang.getFormData().getFormCount()).isEqualTo(2);
 				assertThat(eingang.getFormData().getForm(0).getFieldCount()).isEqualTo(1);
diff --git a/router/src/test/java/de/ozgcloud/eingang/router/VorgangServiceTest.java b/router/src/test/java/de/ozgcloud/eingang/router/VorgangServiceTest.java
index e3b420185c604cac46ab110ca801bac8cae7f5bc..bb1294f2bad530b55eb9dafb45b5dc86dac05306 100644
--- a/router/src/test/java/de/ozgcloud/eingang/router/VorgangServiceTest.java
+++ b/router/src/test/java/de/ozgcloud/eingang/router/VorgangServiceTest.java
@@ -234,6 +234,7 @@ class VorgangServiceTest {
 		@BeforeEach
 		void mock() {
 			preservedFormData = FormDataTestFactory.createBuilder()
+					.zustaendigeStelle(ZustaendigeStelleTestFactory.create())
 					.zustaendigeStelle(ZustaendigeStelleTestFactory.createBuilder()
 							.organisationseinheitenId(ORGANISATIONSEINHEIT_ID_2)
 							.build())
diff --git a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/AfmZustaendigeStelleMapper.java b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/AfmZustaendigeStelleMapper.java
index 46c379d15fc6ffbe3b68841a47a8443721a6a8d1..4fff0ea90b799476bac4f0b3b3c39e4e8378935f 100644
--- a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/AfmZustaendigeStelleMapper.java
+++ b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/AfmZustaendigeStelleMapper.java
@@ -74,7 +74,6 @@ class AfmZustaendigeStelleMapper implements AfmEngineBasedMapper {
 
 		return formData.toBuilder()
 				.formData(addMetaDataFlag(formData))
-				.clearZustaendigeStelles()
 				.zustaendigeStelle(zustaendigeStelle).build();
 	}
 
diff --git a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapper.java b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapper.java
index a140e306f7c2f10030a9ba12cb2132d86201bb87..a99ae318b214154314e9cf5752dcf13ce03d89fe 100644
--- a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapper.java
+++ b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapper.java
@@ -46,7 +46,6 @@ public class ZustaendigeStelleMetadataMapper {
 				.map(this::readZustaendigeStelleMetadata)
 				.map(this::mapZustaendigeStelle)
 				.map(zustaendigeStelle -> formData.toBuilder()
-						.clearZustaendigeStelles()
 						.zustaendigeStelle(zustaendigeStelle).build())
 				.orElse(formData);
 	}
diff --git a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapter.java b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapter.java
index bae3987d8513165869044dbe5f702ac13160b3df..82d0967071bcfcabad3b9a7803d0e23c77e69a7a 100644
--- a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapter.java
+++ b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapter.java
@@ -103,7 +103,6 @@ public class DFoerdermittelEngineBasedSemantikAdapter implements EngineBasedSema
 		return Optional.ofNullable((String) getFachnachricht(formData).get(KEY_ORGANISATIONS_EINHEIT_ID))
 				.map(orgaId -> addOrganisationsEinheitId(orgaId, formData.getZustaendigeStelles()))
 				.map(zustStelle -> formData.toBuilder()
-						.clearZustaendigeStelles()
 						.zustaendigeStelle(zustStelle)
 						.build())
 				.orElse(formData);
@@ -116,17 +115,16 @@ public class DFoerdermittelEngineBasedSemantikAdapter implements EngineBasedSema
 		} else {
 			var zustaendigeStellesIterator = zustaendigeStelles.iterator();
 			var zustaendigeStelle = zustaendigeStellesIterator.next();
-			if (zustaendigeStellesIterator.hasNext()) {
-				logErrorForMoreThanOneZustaendigeStelle();
-			}
+			logErrorForExistingZustaendigeStelle();
 			zustaendigeStelleBuilder = zustaendigeStelle.toBuilder();
 		}
 
 		return zustaendigeStelleBuilder.organisationseinheitenId(orgaId).build();
 	}
 
-	void logErrorForMoreThanOneZustaendigeStelle() {
-		LOG.error("Expect at most one existing ZustaendigeStelle for DFoerdermittel. Continuing by using the first one.");
+	void logErrorForExistingZustaendigeStelle() {
+		LOG.error(
+				"Expect no existing ZustaendigeStelle for DFoerdermittel! Continuing with two ZustaendigeStelles, the original(s) and a copy of the first with overridden OrganisationsEinheitId.");
 	}
 
 	FormData addFormName(FormData formData) {
diff --git a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapper.java b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapper.java
index aa1f66b8deaf00d48a63efcbe284de82a88163fe..e58650aca3e1168d826bf4286be4b742873e5c5c 100644
--- a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapper.java
+++ b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapper.java
@@ -40,7 +40,6 @@ class FormSolutionsZustaendigeStelleMapper implements FormSolutionsEngineBasedMa
 	@Override
 	public FormData parseFormData(FormData formData) {
 		return formData.toBuilder()
-				.clearZustaendigeStelles()
 				.zustaendigeStelle(buildZustaendigeStelle(formData))
 				.formData(removeProcessedData(formData))
 				.build();
diff --git a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/formbased/mantelantrag/MantelantragZustaendigeStelleMapper.java b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/formbased/mantelantrag/MantelantragZustaendigeStelleMapper.java
index fb071fdce3c6b202f5723bbbf6a5b5bcb29c3baa..29e2c0834d9a05e11519f371cdd2686faa549ed4 100644
--- a/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/formbased/mantelantrag/MantelantragZustaendigeStelleMapper.java
+++ b/semantik-adapter/src/main/java/de/ozgcloud/eingang/semantik/formbased/mantelantrag/MantelantragZustaendigeStelleMapper.java
@@ -90,7 +90,6 @@ public class MantelantragZustaendigeStelleMapper implements FormBasedMapper {
 
 	private FormData adaptFormDataWithValueGetter(FormData formData, UnaryOperator<String> getValueOrEmpty) {
 		return formData.toBuilder()
-				.clearZustaendigeStelles()
 				.zustaendigeStelle(ZustaendigeStelle.builder()
 						.organisationseinheitenId(getOrganisationseinheitId(getValueOrEmpty))
 						.bezeichnung(getValueOrEmpty.apply(BEZEICHNUNG_FIELD))
diff --git a/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapperTest.java b/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapperTest.java
index 78fec0362ca5a8f48e40dd711764b4e2075a66e8..d2b0412c81d0830aa3080902ea8c91371fac7e17 100644
--- a/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapperTest.java
+++ b/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/afm/ZustaendigeStelleMetadataMapperTest.java
@@ -1,6 +1,5 @@
 package de.ozgcloud.eingang.semantik.enginebased.afm;
 
-import static java.util.Collections.*;
 import static org.assertj.core.api.Assertions.*;
 import static org.mockito.Mockito.*;
 
@@ -83,10 +82,8 @@ class ZustaendigeStelleMetadataMapperTest {
 	@Nested
 	class TestReadBehoerdeMetadata {
 
-
 		private File brokenFile;
 
-
 	}
 
 	@Nested
diff --git a/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapterTest.java b/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapterTest.java
index 079902c9d49e2dfff24ebc36566cb68bc22eba0b..1d078b3f189f4469c0a81e7f43da820f35b654fe 100644
--- a/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapterTest.java
+++ b/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/dfoerdermittel/DFoerdermittelEngineBasedSemantikAdapterTest.java
@@ -224,9 +224,7 @@ class DFoerdermittelEngineBasedSemantikAdapterTest {
 		class TestWithNoExistingZustaendigeStelles {
 			@Test
 			void shouldHaveOrganisationsEinheitId() {
-				var inputFormData = DFoerdermittelFormDataTestFactory.createBuilder()
-						.clearZustaendigeStelles()
-						.build();
+				var inputFormData = DFoerdermittelFormDataTestFactory.create();
 
 				var formData = adapter.addOrganisationsEinheitId(inputFormData);
 
@@ -239,24 +237,11 @@ class DFoerdermittelEngineBasedSemantikAdapterTest {
 		@DisplayName("with one existing zustaendige stelle")
 		@Nested
 		class TestWithOneExistingZustaendigeStelle {
-			@Test
-			void shouldHaveOrganisationsEinheitId() {
-				var formData = adapter.addOrganisationsEinheitId(DFoerdermittelFormDataTestFactory.create());
-
-				assertThat(formData.getZustaendigeStelles())
-						.extracting(ZustaendigeStelle::getOrganisationseinheitenId)
-						.containsExactly(ORGANISATIONS_EINHEIT_ID);
-			}
-		}
-
-		@DisplayName("with two existing zustaendige stelles")
-		@Nested
-		class TestWithTwoExistingZustaendigeStelles {
 
 			private FormData inputFormData;
 
 			@BeforeEach
-			void setup() {
+			void mock() {
 				inputFormData = DFoerdermittelFormDataTestFactory.createBuilder()
 						.zustaendigeStelle(ZustaendigeStelleTestFactory.create())
 						.build();
@@ -268,15 +253,15 @@ class DFoerdermittelEngineBasedSemantikAdapterTest {
 
 				assertThat(formData.getZustaendigeStelles())
 						.extracting(ZustaendigeStelle::getOrganisationseinheitenId)
-						.containsExactly(ORGANISATIONS_EINHEIT_ID);
+						.containsExactly(ZustaendigeStelleTestFactory.ORGANISATIONSEINHEIT_ID, ORGANISATIONS_EINHEIT_ID);
 			}
 
-			@DisplayName("should log error for more than one zustaendige stelle")
+			@DisplayName("should log error for existing zustaendige stelle")
 			@Test
-			void shouldLogErrorForMoreThanOneZustaendigeStelle() {
+			void shouldLogErrorForExistingZustaendigeStelle() {
 				adapter.addOrganisationsEinheitId(inputFormData);
 
-				verify(adapter).logErrorForMoreThanOneZustaendigeStelle();
+				verify(adapter).logErrorForExistingZustaendigeStelle();
 			}
 		}
 	}
diff --git a/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapperTest.java b/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapperTest.java
index d5dc287138426b71beeb3cbb56e267a0d2f88efe..bd31c4218074b8bc343d3327e10455885df7371a 100644
--- a/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapperTest.java
+++ b/semantik-adapter/src/test/java/de/ozgcloud/eingang/semantik/enginebased/formsolutions/FormSolutionsZustaendigeStelleMapperTest.java
@@ -27,7 +27,6 @@ import static de.ozgcloud.eingang.common.formdata.ZustaendigeStelleTestFactory.*
 import static de.ozgcloud.eingang.semantik.enginebased.formsolutions.FormSolutionsZustaendigeStelleMapper.*;
 import static org.assertj.core.api.Assertions.*;
 
-import java.util.Collections;
 import java.util.Map;
 
 import org.junit.jupiter.api.BeforeEach;
@@ -53,7 +52,6 @@ class FormSolutionsZustaendigeStelleMapperTest {
 		@BeforeEach
 		void setup() {
 			formData = FormDataTestFactory.createBuilder()
-					.zustaendigeStelles(Collections.emptyList())
 					.formData(Map.of(
 							FormDataTestFactory.SIMPLE_VALUE_KEY, FormDataTestFactory.SIMPLE_VALUE,
 							FormSolutionsZustaendigeStelleMapper.ZUSTAENDIGE_STELLE, ORGANISATIONSEINHEIT_ID))