diff --git a/api/letter_templates/context_generator.py b/api/letter_templates/context_generator.py
index aaa92178c1..d2b90ee71d 100644
--- a/api/letter_templates/context_generator.py
+++ b/api/letter_templates/context_generator.py
@@ -148,7 +148,7 @@ class Meta:
 class LicenceSerializer(serializers.ModelSerializer):
     class Meta:
         model = Licence
-        fields = ["duration", "start_date", "end_date"]
+        fields = ["duration", "start_date", "end_date", "reference_code"]
 
     start_date = serializers.DateField(format=DATE_FORMAT, input_formats=None)
     end_date = serializers.SerializerMethodField()
diff --git a/api/letter_templates/templates/letter_templates/siel.html b/api/letter_templates/templates/letter_templates/siel.html
index b7ccb4b747..39833594bd 100644
--- a/api/letter_templates/templates/letter_templates/siel.html
+++ b/api/letter_templates/templates/letter_templates/siel.html
@@ -37,7 +37,7 @@ <h1>Standard Individual Export Licence</h1>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">2. Licence number</span>
-          <span class="cell__uppercase">{{ case_reference }}</span>
+          <span class="cell__uppercase">{{ licence.reference_code }}</span>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">3a. Commencement date</span>
@@ -242,7 +242,7 @@ <h1>Standard Individual Export Licence</h1>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">2. Licence number</span>
-          <span class="cell__uppercase">{{ case_reference }}</span>
+          <span class="cell__uppercase">{{ licence.reference_code }}</span>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">3a. Commencement date</span>
@@ -349,7 +349,7 @@ <h1>Standard Individual Export Licence</h1>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">2. Licence number</span>
-          <span class="cell__uppercase">{{ case_reference }}</span>
+          <span class="cell__uppercase">{{ licence.reference_code }}</span>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">3a. Commencement date</span>
@@ -541,7 +541,7 @@ <h1>Standard Individual Export Licence</h1>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">2. Licence number</span>
-          <span class="cell__uppercase">{{ case_reference }}</span>
+          <span class="cell__uppercase">{{ licence.reference_code }}</span>
         </td>
         <td class="border-black" colspan="3">
           <span class="cell__heading">3a. Commencement date</span>
diff --git a/api/letter_templates/tests/test_context_generation.py b/api/letter_templates/tests/test_context_generation.py
index 8147abf6a1..a325cba470 100644
--- a/api/letter_templates/tests/test_context_generation.py
+++ b/api/letter_templates/tests/test_context_generation.py
@@ -89,6 +89,7 @@ def _assert_licence(self, context, licence):
         self.assertEqual(context["start_date"], licence.start_date.strftime(DATE_FORMAT))
         self.assertEqual(context["duration"], licence.duration)
         self.assertEqual(context["end_date"], add_months(licence.start_date, licence.duration))
+        self.assertEqual(context["reference_code"], licence.reference_code)
 
     def _assert_party(self, context, party):
         self.assertEqual(context["name"], party.name)