diff --git a/ccdImports/configFiles/CCD_Probate_Backoffice/CaseEvent.json b/ccdImports/configFiles/CCD_Probate_Backoffice/CaseEvent.json
index 259c4cf173..45a4464377 100644
--- a/ccdImports/configFiles/CCD_Probate_Backoffice/CaseEvent.json
+++ b/ccdImports/configFiles/CCD_Probate_Backoffice/CaseEvent.json
@@ -36,7 +36,7 @@
   {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "boAmendCaseDetailsGrantRegistrarEscalation", "Name": "Amend case details", "Description": "Amend case details", "DisplayOrder": 35, "PreConditionState(s)": "BOGrantIssuedRegistrarEscalation", "PostConditionState": "BOGrantIssuedRegistrarEscalation", "CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/case/validateCaseDetails", "SecurityClassification": "Public", "ShowSummary": "Y", "ShowEventNotes": "Y"},
   {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "boAmendCaseDetailsPostGrantRegistrarEscalation", "Name": "Amend case details", "Description": "Amend case details", "DisplayOrder": 36, "PreConditionState(s)": "BOPostGrantIssuedRegistrarEscalation", "PostConditionState": "BOPostGrantIssuedRegistrarEscalation", "CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/case/validateCaseDetails", "SecurityClassification": "Public", "ShowSummary": "Y", "ShowEventNotes": "Y"},
   {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "boAmendCaseDetailsForImport", "Name": "Amend case details for import", "Description": "Amend case details for import", "DisplayOrder": 37, "PreConditionState(s)": "BOCaseImported", "PostConditionState": "CaseCreated", "CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/case/validateCaseDetails", "SecurityClassification": "Public", "ShowSummary": "N", "ShowEventNotes": "Y"},
-  {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "boAmendLegalStatement", "Name": "Amend legal statement", "Description": "Upload an amended legal statement", "DisplayOrder": 38, "PreConditionState(s)": "*", "PostConditionState": "*", "CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/document/amendLegalStatement", "SecurityClassification": "Public", "ShowSummary": "Y", "ShowEventNotes": "Y"},
+  {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "boAmendLegalStatement", "Name": "Amend legal statement", "Description": "Upload an amended legal statement", "DisplayOrder": 38, "PreConditionState(s)": "*", "PostConditionState": "*", "CallBackURLAboutToStartEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/document/startAmendLegalStatement", CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/document/amendLegalStatement", "SecurityClassification": "Public", "ShowSummary": "Y", "ShowEventNotes": "Y"},
   {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "solicitorCreateApplication", "Name": "Apply for probate", "Description": "Solicitor begins a new application with firm and case details", "DisplayOrder": 39, "PostConditionState": "SolAppCreatedDeceasedDtls",  "CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/case/sols-created", "CallBackURLSubmittedEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/case/sols-access?caseTypeId=GrantOfRepresentation", "SecurityClassification": "Public", "ShowSummary": "Y", "CanSaveDraft": "y", "EndButtonLabel": "Save and continue", "ShowEventNotes": "Y"},
   {"LiveFrom": "01/01/2021", "CaseTypeID": "GrantOfRepresentation", "ID": "applyNocDecision", "Name": "Apply NoC Decision", "Description": "Apply Notice of Change Request", "DisplayOrder": 40, "PreConditionState(s)": "CasePrinted;BOCaseStoppedAwaitRedec;BOCaseImported;BOCaseMatchingIssueGrant;BOCaseQA;BOCaseStopped;BOCaveatPermenant;BOSotGenerated;BOReadyToIssue;BORedecNotificationSent;BOCaseWorkerEscalation;Dormant;BORegistrarEscalation;", "PostConditionState": "*", "CallBackURLAboutToStartEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/noc/apply-decision", "CallBackURLSubmittedEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/notify/noc-notification", "SecurityClassification": "Public", "ShowSummary": "Y", "ShowEventNotes": "Y"},
   {"LiveFrom": "01/01/2017", "CaseTypeID": "GrantOfRepresentation", "ID": "assembleLetter", "Name": "Assemble a letter", "Description": "Assemble a letter", "DisplayOrder": 41, "PreConditionState(s)": "BOCaseStopped", "PostConditionState": "BOCaseStopped", "CallBackURLAboutToSubmitEvent": "http://${CCD_DEF_CASE_SERVICE_BASE_URL}/document/generateLetter", "SecurityClassification": "Public", "ShowSummary": "N", "ShowEventNotes": "Y"},
diff --git a/src/main/java/uk/gov/hmcts/probate/controller/DocumentController.java b/src/main/java/uk/gov/hmcts/probate/controller/DocumentController.java
index aadb86312d..4048b433de 100644
--- a/src/main/java/uk/gov/hmcts/probate/controller/DocumentController.java
+++ b/src/main/java/uk/gov/hmcts/probate/controller/DocumentController.java
@@ -455,6 +455,20 @@ public ResponseEntity<WillLodgementCallbackResponse> permanentlyDeleteRemovedWil
         return ResponseEntity.ok(willLodgementCallbackResponseTransformer.transform(callbackRequest));
     }
 
+    @PostMapping(path = "/startAmendLegalStatement", consumes = APPLICATION_JSON_VALUE)
+    public ResponseEntity<CallbackResponse> startAmendLegalStatement(
+            @RequestBody final CallbackRequest callbackRequest) {
+        final CaseDetails caseDetails = callbackRequest.getCaseDetails();
+        final long caseId = caseDetails.getId();
+
+        log.info("Starting amend legal statement for case: {}", caseId);
+
+        redeclarationSoTValidationRule.validate(caseDetails);
+
+        CallbackResponse response = callbackResponseTransformer.transformCase(callbackRequest, Optional.empty());
+        return ResponseEntity.ok(response);
+    }
+
     @PostMapping(path = "/validateAmendLegalStatement", consumes = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<CallbackResponse> validateAmendLegalStatement(
             @RequestBody final CallbackRequest callbackRequest) {
diff --git a/src/test/java/uk/gov/hmcts/probate/controller/DocumentControllerUnitTest.java b/src/test/java/uk/gov/hmcts/probate/controller/DocumentControllerUnitTest.java
index 0e8f736ccf..4b95280115 100644
--- a/src/test/java/uk/gov/hmcts/probate/controller/DocumentControllerUnitTest.java
+++ b/src/test/java/uk/gov/hmcts/probate/controller/DocumentControllerUnitTest.java
@@ -328,4 +328,16 @@ void shouldTransformForCitizenHubResponse() {
         verify(callbackResponseTransformer, times(1)).transformCitizenHubResponse(callbackRequest);
         assertThat(response.getStatusCode(), is(HttpStatus.OK));
     }
+
+    @Test
+    void shouldCallValidateSotForStartAmendLegalStatement() {
+        CallbackRequest callbackRequest = mock(CallbackRequest.class);
+        CaseDetails caseDetailsMock = mock(CaseDetails.class);
+        when(callbackRequest.getCaseDetails()).thenReturn(caseDetailsMock);
+
+        ResponseEntity<CallbackResponse> response = documentController.startAmendLegalStatement(callbackRequest);
+
+        verify(redeclarationSoTValidationRule, times(1)).validate(caseDetailsMock);
+        assertThat(response.getStatusCode(), is(HttpStatus.OK));
+    }
 }