diff --git a/src/main/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImpl.java b/src/main/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImpl.java
index dc7fac4..d7498a5 100644
--- a/src/main/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImpl.java
+++ b/src/main/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImpl.java
@@ -159,8 +159,8 @@ private static void clearNameMismatchReasonIfRequired(PscVerification pscVerific
         VerificationDetails verificationDetails = pscVerification.getData().verificationDetails();
 
         if (verificationDetails != null) {
-            Map<String, Object> mergeVerificationDetails = (Map<String, Object>) mergePatch.get("verification_details");
-            String mergeUvid = (String) mergeVerificationDetails.get("uvid");
+            final var mergeVerificationDetails = (Map<String, Object>) mergePatch.get("verification_details");
+            final var mergeUvid = mergeVerificationDetails != null ? (String) mergeVerificationDetails.get("uvid") : null;
 
             if (verificationDetails.uvid() != null && mergeUvid != null
                 && !verificationDetails.uvid().equals(mergeUvid)
diff --git a/src/main/java/uk/gov/companieshouse/pscverificationapi/error/RestExceptionHandler.java b/src/main/java/uk/gov/companieshouse/pscverificationapi/error/RestExceptionHandler.java
index 866ea89..3f716ab 100644
--- a/src/main/java/uk/gov/companieshouse/pscverificationapi/error/RestExceptionHandler.java
+++ b/src/main/java/uk/gov/companieshouse/pscverificationapi/error/RestExceptionHandler.java
@@ -122,6 +122,7 @@ public ApiErrors handleInvalidFilingException(final InvalidFilingException ex,
     @ResponseBody
     public ResponseEntity<Object> handleMergePatchException(final MergePatchException ex,
         final WebRequest request) {
+        logError(chLogger, request, "Invalid patch data", ex, null);
         return createRedactedErrorResponseEntity(ex, request, ex.getCause(),
             validation.get("patch-merge-error-prefix"));
     }
diff --git a/src/main/java/uk/gov/companieshouse/pscverificationapi/exception/MergePatchException.java b/src/main/java/uk/gov/companieshouse/pscverificationapi/exception/MergePatchException.java
index c02b72c..db62103 100644
--- a/src/main/java/uk/gov/companieshouse/pscverificationapi/exception/MergePatchException.java
+++ b/src/main/java/uk/gov/companieshouse/pscverificationapi/exception/MergePatchException.java
@@ -5,8 +5,7 @@
  */
 public class MergePatchException extends RuntimeException {
 
-    public MergePatchException(final Throwable cause) {
-        super(cause);
+    public MergePatchException(final String message, final Throwable cause) {
+        super(message, cause);
     }
-
 }
diff --git a/src/main/java/uk/gov/companieshouse/pscverificationapi/service/impl/PscVerificationServiceImpl.java b/src/main/java/uk/gov/companieshouse/pscverificationapi/service/impl/PscVerificationServiceImpl.java
index 61c561d..0f93da9 100644
--- a/src/main/java/uk/gov/companieshouse/pscverificationapi/service/impl/PscVerificationServiceImpl.java
+++ b/src/main/java/uk/gov/companieshouse/pscverificationapi/service/impl/PscVerificationServiceImpl.java
@@ -71,7 +71,7 @@ public PatchResult patch(final String filingId, final Map<String, Object> patchM
             patchResult = patchEntity(filingId, pscVerificationFilingProvider, patchMap,
                     mergeProcessor, postMergeProcessor, pscVerificationPatchValidator);
         } catch (final IOException e) {
-            throw new MergePatchException(e);
+            throw new MergePatchException(e.getMessage(), e);
         }
 
         return patchResult;
diff --git a/src/test/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImplMergeIT.java b/src/test/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImplMergeIT.java
index 5319e34..076ad49 100644
--- a/src/test/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImplMergeIT.java
+++ b/src/test/java/uk/gov/companieshouse/pscverificationapi/controller/impl/PscVerificationControllerImplMergeIT.java
@@ -53,7 +53,7 @@
 class PscVerificationControllerImplMergeIT extends BaseControllerIT {
     private static final URI SELF = URI.create(
         "/transactions/" + TRANS_ID + "/persons-with-significant-control-verification/" + FILING_ID);
-    private static final URI VALID = URI.create(SELF.toString() + "/validation_status");
+    private static final URI VALID = URI.create(SELF + "/validation_status");
     private static final LocalDate DATE_OF_BIRTH = LocalDate.of(1970, 1, 1);
     private static final String DOB_STRING = DATE_OF_BIRTH.toString();
 
@@ -102,7 +102,7 @@ void updatePscVerificationWhenReplacingFields() throws Exception {
             .append("1990-11-11")
             .append("\"},")
             .append("\"verification_details\":{")
-            .append("\"name_mismatch_reason\":\"MAIDEN_NAME\",")
+            .append("\"name_mismatch_reason\":\"LEGAL_NAME_CHANGE\",")
             .append("\"verification_statements\":[")
             .append("\"RO_IDENTIFIED\",")
             .append("\"RO_VERIFIED\",")
@@ -194,7 +194,7 @@ void updatePscVerificationWhenAddingFields() throws Exception {
             .append("1990-11-11")
             .append("\"},")
             .append("\"verification_details\":{")
-            .append("\"name_mismatch_reason\":\"MAIDEN_NAME\",")
+            .append("\"name_mismatch_reason\":\"LEGAL_NAME_CHANGE\",")
             .append("\"verification_statements\":[")
             .append("\"RO_IDENTIFIED\",")
             .append("\"RO_VERIFIED\",")
@@ -278,7 +278,7 @@ void updatePscVerificationWhenDeletingFields() throws Exception {
             .append("\"surname\": null},")
             .append("\"date_of_birth\": null},")
             .append("\"verification_details\":{")
-            .append("\"name_mismatch_reason\":\"MAIDEN_NAME\",")
+            .append("\"name_mismatch_reason\":\"LEGAL_NAME_CHANGE\",")
             .append("\"verification_statements\": null}")
             .append("}")
             .toString();