diff --git a/PostFundManagement.ConsoleUI/src/pages/GovernancePage.tsx b/PostFundManagement.ConsoleUI/src/pages/GovernancePage.tsx
index 56c8e30..029073e 100644
--- a/PostFundManagement.ConsoleUI/src/pages/GovernancePage.tsx
+++ b/PostFundManagement.ConsoleUI/src/pages/GovernancePage.tsx
@@ -29,6 +29,7 @@ import {
   CheckCircle2,
   Loader2,
   Lock,
+  AlertTriangle,
 } from 'lucide-react';
 import {
   getOrganisations,
@@ -113,6 +114,7 @@ const organisationSchema = z.object({
   registrationNo: z.string().min(4, 'Registration number is mandatory'),
   email: z.string().email('Enter a valid email address'),
   organisationUser: z.string().min(1, 'Please select a linked executive or manager user'),
+  idNumber: z.string().optional(),
   type: z.coerce.number().min(1).max(27),
   status: z.coerce.number().optional(),
 });
@@ -593,11 +595,23 @@ export const GovernancePage: React.FC = () => {
       registrationNo: '',
       email: '',
       organisationUser: '',
+      idNumber: '',
       type: OrganisationType.Enterprise,
       status: ActivityStatus.Active,
     },
   });
 
+  const watchedOrgUser = orgForm.watch('organisationUser');
+  const selectedExecutiveUser = React.useMemo(() => {
+    if (!watchedOrgUser) return null;
+    const str = String(watchedOrgUser).toLowerCase();
+    return (
+      usersDirectory.find((u) => u.id && String(u.id).toLowerCase() === str) ||
+      modalExecutiveUsers.find((u) => u.id && String(u.id).toLowerCase() === str) ||
+      null
+    );
+  }, [watchedOrgUser, usersDirectory, modalExecutiveUsers]);
+
   const portfolioForm = useForm<PortfolioFormValues>({
     resolver: zodResolver(portfolioSchema),
     defaultValues: {
@@ -622,11 +636,20 @@ export const GovernancePage: React.FC = () => {
   const orgMutation = useMutation({
     mutationFn: (data: OrganisationFormValues) => {
       if (editingOrg) {
+        if (!data.idNumber || !data.idNumber.trim()) {
+          orgForm.setError('idNumber', {
+            type: 'manual',
+            message: 'Government ID number is required to assign this executive user.',
+          });
+          throw new Error('Executive user ID number is required when updating an organisation.');
+        }
+
         return updateOrganisation({
           organisationId: editingOrg.id,
           name: data.name,
           registrationNo: data.registrationNo,
           email: data.email,
+          idNumber: data.idNumber.trim(),
           organisationUser: data.organisationUser,
           type: Number(data.type),
           status: data.status !== undefined ? Number(data.status) : ActivityStatus.Active,
@@ -636,6 +659,7 @@ export const GovernancePage: React.FC = () => {
         name: data.name,
         registrationNo: data.registrationNo,
         email: data.email,
+        idNumber: data.idNumber?.trim() || null,
         organisationUser: data.organisationUser,
         type: Number(data.type),
       });
@@ -753,6 +777,7 @@ export const GovernancePage: React.FC = () => {
       registrationNo: '',
       email: '',
       organisationUser: defaultUser?.id || '',
+      idNumber: defaultUser?.idNumber || '',
       type: OrganisationType.Enterprise,
       status: ActivityStatus.Active,
     });
@@ -770,9 +795,10 @@ export const GovernancePage: React.FC = () => {
       '';
 
     let selectedUserId = '';
+    let matchedUser: User | undefined;
     if (targetUserId) {
       const targetStr = String(targetUserId).toLowerCase();
-      const matchedUser = usersDirectory.find(
+      matchedUser = usersDirectory.find(
         (u) =>
           (u.id && String(u.id).toLowerCase() === targetStr) ||
           (u.email && u.email.toLowerCase() === targetStr)
@@ -792,15 +818,25 @@ export const GovernancePage: React.FC = () => {
       }
     }
 
+    const resolvedIdNumber = matchedUser?.idNumber || org.idNumber || '';
+
     orgForm.reset({
       name: org.name || '',
       registrationNo: org.registrationNo || '',
       email: org.email || '',
       organisationUser: selectedUserId,
+      idNumber: resolvedIdNumber,
       type: org.type || OrganisationType.Enterprise,
       status: org.status ?? ActivityStatus.Active,
     });
 
+    if (selectedUserId && !resolvedIdNumber) {
+      orgForm.setError('idNumber', {
+        type: 'manual',
+        message: 'This executive user has no ID number on file. An ID number is required to update the organisation.',
+      });
+    }
+
     setIsQuickAddUserOpen(false);
     setQuickUserError(null);
     setIsOrgModalOpen(true);
@@ -1760,7 +1796,32 @@ export const GovernancePage: React.FC = () => {
                 )}
               </div>
               <select
-                {...orgForm.register('organisationUser')}
+                {...orgForm.register('organisationUser', {
+                  onChange: (e) => {
+                    const selectedId = e.target.value;
+                    if (!selectedId) {
+                      orgForm.setValue('idNumber', '');
+                      return;
+                    }
+                    const str = String(selectedId).toLowerCase();
+                    const matched =
+                      usersDirectory.find((u) => u.id && String(u.id).toLowerCase() === str) ||
+                      modalExecutiveUsers.find((u) => u.id && String(u.id).toLowerCase() === str);
+
+                    if (matched?.idNumber && matched.idNumber.trim()) {
+                      orgForm.setValue('idNumber', matched.idNumber.trim(), { shouldValidate: true });
+                      orgForm.clearErrors('idNumber');
+                    } else {
+                      orgForm.setValue('idNumber', '', { shouldValidate: true });
+                      if (editingOrg) {
+                        orgForm.setError('idNumber', {
+                          type: 'manual',
+                          message: 'Selected user has no ID number on file. Please enter their ID number to enable executive assignment.',
+                        });
+                      }
+                    }
+                  },
+                })}
                 className="w-full px-3 py-2 text-xs border border-slate-700/80 rounded-xl focus:outline-none focus:ring-1 focus:ring-blue-500 bg-[#090d16] text-white font-medium"
               >
                 <option value="">-- Select linked executive or manager account --</option>
@@ -1778,9 +1839,61 @@ export const GovernancePage: React.FC = () => {
                   No Executive or Manager user found. Create one below to continue.
                 </p>
               )}
+              {watchedOrgUser && selectedExecutiveUser && selectedExecutiveUser.idNumber && selectedExecutiveUser.idNumber.trim() && (
+                <div className="flex items-center gap-1.5 text-[11px] text-emerald-400 mt-1">
+                  <CheckCircle className="w-3.5 h-3.5 text-emerald-400 shrink-0" />
+                  <span>ID on file: <strong className="font-mono text-emerald-300">{selectedExecutiveUser.idNumber}</strong></span>
+                </div>
+              )}
             </div>
           </div>
 
+          {/* Missing ID Number Alert */}
+          {watchedOrgUser && selectedExecutiveUser && (!selectedExecutiveUser.idNumber || !selectedExecutiveUser.idNumber.trim()) && (
+            <div className="p-3 rounded-xl border border-amber-500/30 bg-amber-500/10 text-amber-300 text-xs flex items-start gap-2.5">
+              <AlertTriangle className="w-4 h-4 text-amber-400 shrink-0 mt-0.5" />
+              <div className="space-y-1">
+                <p className="font-semibold text-amber-200">
+                  Missing Executive ID Number
+                </p>
+                <p className="text-[11px] text-amber-300/90 leading-relaxed">
+                  The selected executive (<strong className="font-mono text-white">{selectedExecutiveUser.email || watchedOrgUser}</strong>) does not have a Government ID Number on file. An ID number is required to assign this executive user; otherwise the update will be ignored. Please enter their ID number below.
+                </p>
+              </div>
+            </div>
+          )}
+
+          {/* Executive User ID Number Input */}
+          <div>
+            <div className="flex items-center justify-between mb-1">
+              <div className="flex items-center gap-1">
+                <label className="block text-xs font-semibold text-slate-300">
+                  Executive ID Number {editingOrg ? '*' : '(Optional)'}
+                </label>
+                <HelpTooltip
+                  title="Executive ID Requirement"
+                  content="Government Issued ID or Passport of the executive. Required when updating to persist the executive user link; otherwise the update will be ignored."
+                  size="sm"
+                  placement="top"
+                />
+              </div>
+              {selectedExecutiveUser?.idNumber && (
+                <span className="text-[10px] text-emerald-400 font-mono">Sourced from profile</span>
+              )}
+            </div>
+            <input
+              type="text"
+              {...orgForm.register('idNumber')}
+              className={`w-full px-3 py-2 text-xs border rounded-xl focus:outline-none focus:ring-1 focus:ring-blue-500 text-white bg-[#090d16] font-mono ${
+                orgForm.formState.errors.idNumber ? 'border-rose-500 ring-1 ring-rose-500' : 'border-slate-700/80'
+              }`}
+              placeholder="Enter 13-digit ID or Passport Number"
+            />
+            {orgForm.formState.errors.idNumber && (
+              <p className="text-[10px] text-rose-500 mt-1">{orgForm.formState.errors.idNumber.message}</p>
+            )}
+          </div>
+
           {/* Inline Collapsible Subform to Create Executive User */}
           {isQuickAddUserOpen && !editingOrg && (
             <div className="p-3.5 rounded-xl border border-blue-500/30 bg-blue-950/20 space-y-3">