diff --git a/iris-client-bff/src/main/java/iris/client_bff/config/DataSubmissionConfig.java b/iris-client-bff/src/main/java/iris/client_bff/config/DataSubmissionConfig.java
index 59917a8c0..f2f73d1c1 100644
--- a/iris-client-bff/src/main/java/iris/client_bff/config/DataSubmissionConfig.java
+++ b/iris-client-bff/src/main/java/iris/client_bff/config/DataSubmissionConfig.java
@@ -1,5 +1,7 @@
 package iris.client_bff.config;
 
+import static com.googlecode.jsonrpc4j.ErrorResolver.JsonError.*;
+
 import iris.client_bff.cases.eps.CaseDataController;
 import iris.client_bff.core.alert.AlertService;
 import iris.client_bff.events.eps.EventDataController;
@@ -11,6 +13,11 @@
 
 import java.lang.reflect.Method;
 import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Optional;
+
+import javax.validation.ConstraintViolationException;
 
 import org.springframework.context.NoSuchMessageException;
 import org.springframework.context.annotation.Bean;
@@ -24,6 +31,7 @@
 import com.googlecode.jsonrpc4j.AnnotationsErrorResolver;
 import com.googlecode.jsonrpc4j.DefaultErrorResolver;
 import com.googlecode.jsonrpc4j.ErrorData;
+import com.googlecode.jsonrpc4j.ErrorResolver;
 import com.googlecode.jsonrpc4j.JsonRpcInterceptor;
 import com.googlecode.jsonrpc4j.MultipleErrorResolver;
 import com.googlecode.jsonrpc4j.ProxyUtil;
@@ -35,9 +43,12 @@
 public class DataSubmissionConfig {
 
 	public static final String DATA_SUBMISSION_ENDPOINT = "/data-submission-rpc";
-
 	public static final String DATA_SUBMISSION_ENDPOINT_WITH_SLASH = "/data-submission-rpc/";
 
+	private final Map<Class<? extends Throwable>, Integer> exception2CodeMap = Map.of(
+			ConstraintViolationException.class, INVALID_REQUEST.code,
+			IllegalArgumentException.class, INVALID_REQUEST.code);
+
 	private final MessageSourceAccessor messages;
 	private final UserService userService;
 	private final AlertService alertService;
@@ -94,7 +105,7 @@ private JsonServiceExporter createCompositeJsonServiceExporter() {
 	private final class MessageResolvingErrorResolver extends MultipleErrorResolver {
 
 		private MessageResolvingErrorResolver() {
-			super(AnnotationsErrorResolver.INSTANCE, DefaultErrorResolver.INSTANCE);
+			super(AnnotationsErrorResolver.INSTANCE, new IrisErrorResolver(), DefaultErrorResolver.INSTANCE);
 		}
 
 		@Override
@@ -119,6 +130,25 @@ public JsonError resolveError(Throwable t, Method method, List<JsonNode> argumen
 		}
 	}
 
+	private class IrisErrorResolver implements ErrorResolver {
+
+		@Override
+		public JsonError resolveError(Throwable t, Method method, List<JsonNode> arguments) {
+
+			return determineCode(t)
+					.map(code -> new JsonError(code, t.getMessage(), new ErrorData(t.getClass().getName(), t.getMessage())))
+					.orElse(null);
+		}
+
+		private Optional<Integer> determineCode(Throwable t) {
+
+			return exception2CodeMap.entrySet().stream()
+					.filter(it -> it.getKey().isAssignableFrom(t.getClass()))
+					.map(Entry::getValue)
+					.findAny();
+		}
+	}
+
 	/**
 	 * @author Jens Kutzsche
 	 */
diff --git a/iris-client-bff/src/main/java/iris/client_bff/events/eps/EventDataController.java b/iris-client-bff/src/main/java/iris/client_bff/events/eps/EventDataController.java
index 6b7466118..a361a8782 100644
--- a/iris-client-bff/src/main/java/iris/client_bff/events/eps/EventDataController.java
+++ b/iris-client-bff/src/main/java/iris/client_bff/events/eps/EventDataController.java
@@ -17,7 +17,7 @@
 public interface EventDataController {
 
 	@JsonRpcErrors({
-			@JsonRpcError(exception = ResponseStatusException.class, code = -32600)
+			@JsonRpcError(exception = ResponseStatusException.class, code = -32602)
 	})
 	String submitGuestList(
 			@JsonRpcParam(value = "_client") @Valid JsonRpcClientDto client,
diff --git a/iris-client-bff/src/main/java/iris/client_bff/vaccination_info/eps/VaccinationInfoController.java b/iris-client-bff/src/main/java/iris/client_bff/vaccination_info/eps/VaccinationInfoController.java
index fef5e3630..c87d7e85b 100644
--- a/iris-client-bff/src/main/java/iris/client_bff/vaccination_info/eps/VaccinationInfoController.java
+++ b/iris-client-bff/src/main/java/iris/client_bff/vaccination_info/eps/VaccinationInfoController.java
@@ -6,6 +6,7 @@
 import iris.client_bff.core.validation.Base64;
 import iris.client_bff.core.validation.NoSignOfAttack;
 import iris.client_bff.core.validation.PhoneNumber;
+import iris.client_bff.vaccination_info.VaccinationInfoAnnouncementException;
 import iris.client_bff.vaccination_info.VaccinationStatus;
 import iris.client_bff.vaccination_info.VaccinationType;
 
@@ -14,7 +15,6 @@
 import java.util.UUID;
 
 import javax.annotation.Nullable;
-import javax.validation.ConstraintViolationException;
 import javax.validation.Valid;
 import javax.validation.constraints.Email;
 import javax.validation.constraints.NotBlank;
@@ -35,16 +35,12 @@
 public interface VaccinationInfoController {
 
 	@JsonRpcErrors({
-			@JsonRpcError(exception = ConstraintViolationException.class, code = -32600),
-			@JsonRpcError(exception = InvalidPublicKeyException.class, code = -32600)
+			@JsonRpcError(exception = InvalidPublicKeyException.class, code = -32600),
+			@JsonRpcError(exception = VaccinationInfoAnnouncementException.class, code = -32603)
 	})
 	AnnouncementResultDto announceVaccinationInfoList(
 			@JsonRpcParam(value = "announcementData") @Valid AnnouncementDataDto announcementData);
 
-	@JsonRpcErrors({
-			@JsonRpcError(exception = ConstraintViolationException.class, code = -32600),
-			@JsonRpcError(exception = IllegalArgumentException.class, code = -32600)
-	})
 	String submitVaccinationInfoList(
 			@JsonRpcParam(value = "dataAuthorizationToken") @NotNull UUID dataAuthorizationToken,
 			@JsonRpcParam(value = "facility") @Valid Facility facility,