diff --git a/IMPLEMENTATION_PLAN.md b/IMPLEMENTATION_PLAN.md
index 8f72fb6..f8fe9b8 100644
--- a/IMPLEMENTATION_PLAN.md
+++ b/IMPLEMENTATION_PLAN.md
@@ -14,7 +14,7 @@
 
 - [x] **Task 3 — Tests for createEnvelope():** Add test coverage in `DocusignESignatureServiceTest` — success path (mock 201), failure path (mock 400), blank email guard. (NFR-001, TC-001, TC-002)
 
-- [ ] **Task 4 — persistEnvelopeResult() + CaseContext extension:** Add `persistEnvelopeResult()` to `CLMAdminService`. Extend `CaseContext` inner class and `getCaseContext()` SOQL to include the 5 eSignature fields. (FR-003, FR-004)
+- [x] **Task 4 — persistEnvelopeResult() + CaseContext extension:** Add `persistEnvelopeResult()` to `CLMAdminService`. Extend `CaseContext` inner class and `getCaseContext()` SOQL to include the 5 eSignature fields. (FR-003, FR-004)
 
 - [ ] **Task 5 — Tests for persistEnvelopeResult():** Add test coverage in `CLMAdminServiceTest` — verify fields written correctly, `ESignature_Sent_At__c` is set, `ESignature_Completed_At__c` is NOT written on a "sent" result. (NFR-001, TC-003)
 
diff --git a/force-app/main/default/classes/CLMAdminService.cls b/force-app/main/default/classes/CLMAdminService.cls
index 0dca693..bffbbf1 100644
--- a/force-app/main/default/classes/CLMAdminService.cls
+++ b/force-app/main/default/classes/CLMAdminService.cls
@@ -22,6 +22,11 @@ public with sharing class CLMAdminService {
         @AuraEnabled public String attachedFileUrl;
         @AuraEnabled public Datetime lastDocGenRequestedAt;
         @AuraEnabled public Datetime lastDocGenCompletedAt;
+        @AuraEnabled public String eSignatureEnvelopeId;
+        @AuraEnabled public String eSignatureEnvelopeStatus;
+        @AuraEnabled public String eSignatureEnvelopeUrl;
+        @AuraEnabled public Datetime eSignatureSentAt;
+        @AuraEnabled public Datetime eSignatureCompletedAt;
         @AuraEnabled public List<CaseDeficiencyItem> deficiencies;
     }
 
@@ -313,6 +318,11 @@ public with sharing class CLMAdminService {
                    Attached_File_Url__c,
                    Last_DocGen_Requested_At__c,
                    Last_DocGen_Completed_At__c,
+                   ESignature_Envelope_Id__c,
+                   ESignature_Envelope_Status__c,
+                   ESignature_Sent_At__c,
+                   ESignature_Completed_At__c,
+                   ESignature_Envelope_Url__c,
                    (SELECT Id,
                            Deficiency_Number__c,
                            Description__c,
@@ -344,6 +354,11 @@ public with sharing class CLMAdminService {
         context.attachedFileUrl = appraiserCase.Attached_File_Url__c;
         context.lastDocGenRequestedAt = appraiserCase.Last_DocGen_Requested_At__c;
         context.lastDocGenCompletedAt = appraiserCase.Last_DocGen_Completed_At__c;
+        context.eSignatureEnvelopeId = appraiserCase.ESignature_Envelope_Id__c;
+        context.eSignatureEnvelopeStatus = appraiserCase.ESignature_Envelope_Status__c;
+        context.eSignatureEnvelopeUrl = appraiserCase.ESignature_Envelope_Url__c;
+        context.eSignatureSentAt = appraiserCase.ESignature_Sent_At__c;
+        context.eSignatureCompletedAt = appraiserCase.ESignature_Completed_At__c;
         context.deficiencies = new List<CaseDeficiencyItem>();
 
         if (appraiserCase.Deficiencies__r != null) {
@@ -433,6 +448,29 @@ public with sharing class CLMAdminService {
         return result;
     }
 
+    @AuraEnabled(cacheable=false)
+    public static void persistEnvelopeResult(
+        Id caseId,
+        String envelopeId,
+        String envelopeStatus,
+        String envelopeUri
+    ) {
+        if (caseId == null) {
+            return;
+        }
+
+        Appraiser_Case__c updateCase = new Appraiser_Case__c(Id = caseId);
+        updateCase.ESignature_Envelope_Id__c = envelopeId;
+        updateCase.ESignature_Envelope_Status__c = envelopeStatus;
+        updateCase.ESignature_Sent_At__c = System.now();
+
+        if (String.isNotBlank(envelopeUri)) {
+            updateCase.ESignature_Envelope_Url__c = envelopeUri;
+        }
+
+        update updateCase;
+    }
+
     private static String formatAddress(Appraiser_Case__c appraiserCase) {
         return AppraiserCasePayloadBuilder.formatMailingAddress(
             appraiserCase.Property_Street__c,