diff --git a/app/Config/Autoload.php b/app/Config/Autoload.php
index 62b24b8d..58edbca1 100755
--- a/app/Config/Autoload.php
+++ b/app/Config/Autoload.php
@@ -101,6 +101,6 @@ class Autoload extends AutoloadConfig
      * @phpstan-var list<string>
      */
     public $helpers = ['uuid','session','utility', 'form', 'url', 'oauth', 'fileupload',
-    'excel_import_export', 'file', 'drive','ExcelSanitizeHelper', 'api_helper','exception','sms_helper'
+    'excel_import_export', 'file', 'drive','ExcelSanitizeHelper', 'api_helper','exception','sms_helper','sanitizeInputArrayAdvanced'
 ];
 }
diff --git a/app/Controllers/ClientController.php b/app/Controllers/ClientController.php
index 0b6470bc..c5900ca0 100755
--- a/app/Controllers/ClientController.php
+++ b/app/Controllers/ClientController.php
@@ -736,14 +736,102 @@ class ClientController extends AdminController
 
     public function saveDeposit()
     {
+
+       $rules = [
+
+            'amount' => [
+                'rules' => 'required|numeric|greater_than_equal_to[0]',
+                'errors' => [
+                    'required' => 'Amount is required',
+                    'numeric'  => 'Amount must be a valid number',
+                    'greater_than_equal_to' => 'Amount cannot be negative',
+                ]
+            ],
+
+            'client_id' => [
+                'rules' => 'required|is_natural_no_zero',
+                'errors' => [
+                    'required' => 'Client ID is required',
+                    'is_natural_no_zero' => 'Client ID must be a positive integer',
+                ]
+            ],
+
+            'insurer_id' => [
+                'rules' => 'required|is_natural_no_zero',
+                'errors' => [
+                    'required' => 'Insurer ID is required',
+                    'is_natural_no_zero' => 'Insurer ID must be a positive integer',
+                ]
+            ],
+
+            'cd_ac_pk' => [
+                'rules' => 'required|is_natural_no_zero',
+                'errors' => [
+                    'required' => 'Account PK is required',
+                    'is_natural_no_zero' => 'Account PK must be a positive integer',
+                ]
+            ],
+
+            'cd_ac_no' => [
+                'rules' => 'required|is_natural_no_zero',
+                'errors' => [
+                    'required' => 'Account number is required',
+                    'is_natural_no_zero' => 'must be a positive integer',
+                ]
+            ],
+
+            'sub_type_id' => [
+                'rules' => 'required|is_natural_no_zero',
+                'errors' => [
+                    'required' => 'Sub type ID is required',
+                    'is_natural_no_zero' => 'Sub type ID must be a positive integer',
+                ]
+            ],
+
+            'description' => [
+                'rules' => 'required|string|min_length[3]|max_length[255]',
+                'errors' => [
+                    'required' => 'Description is required',
+                    'string' => 'Description must be text',
+                    'min_length' => 'Description must be at least 3 characters',
+                    'max_length' => 'Description must not exceed 255 characters',
+                ]
+            ],
+
+            'transaction_type' => [
+                'rules' => 'required|in_list[Credit,Debit]',
+                'errors' => [
+                    'required' => 'Transaction type is required',
+                    'in_list' => 'Transaction type must be either credit or debit',
+                ]
+            ],
+
+        ];
+
+
+        if (! $this->validate($rules)) {
+            return $this->response
+                ->setStatusCode(400)
+                ->setJSON([
+                    'status' => 'error',
+                    'message' => 'Input validation failed',
+                    'errors' => $this->validator->getErrors()
+                ]);
+        }
+
+        //sanitize the post params
+        $post_data = $this->request->getPost();
+        $sanitized_post_data = sanitizeInputArrayAdvanced($post_data);
         // Retrieve form data from POST request
         $loggedInUserID = get_session_userid();
+        // print_rr($sanitized_post_data);die();
+        $client_id = $sanitized_post_data['client_id'];
+        $insurer_id = $sanitized_post_data['insurer_id'];
+        $record_date = $sanitized_post_data['record_date'];
+        $cd_ac_pk = $sanitized_post_data['cd_ac_pk'];
+        $cd_ac_no = $sanitized_post_data['cd_ac_no'];
 
-        $client_id = $this->request->getPost('client_id');
-        $insurer_id = $this->request->getPost('insurer_id');
-        $record_date = $this->request->getPost('record_date');
-        $cd_ac_pk = $this->request->getPost('cd_ac_pk');
-        $cd_ac_no = $this->request->getPost('cd_ac_no');
+         
 
         // $CD_Account_Number = $this->CDMasterModel
         //     ->where('client_id', $client_id)
@@ -761,16 +849,16 @@ class ClientController extends AdminController
         }
 
         $data = [
-            'amount' => $this->request->getPost('amount'),
-            'sub_type_id' => $this->request->getPost('sub_type_id'),
-            'client_id' => $this->request->getPost('client_id'),
+            'amount' => $sanitized_post_data['amount'],
+            'sub_type_id' => $sanitized_post_data['sub_type_id'],
+            'client_id' => $sanitized_post_data['client_id'],
             'client_policy_id' => null,
             'cd_ac_no' => $cd_ac_no ?? null,
             'cd_ac_pk' => $cd_ac_pk ?? null,
             'endorsement_no' => null,
-            'insurer_id' => $this->request->getPost('insurer_id'),
-            'description' => $this->request->getPost('description'),
-            'transaction_type' => $this->request->getPost('transaction_type') ?: 'Credit',
+            'insurer_id' => $sanitized_post_data['insurer_id'],
+            'description' => $sanitized_post_data['description'],
+            'transaction_type' => $sanitized_post_data['transaction_type'] ?: 'Credit',
             'updated_by' => 1,
             'record_date' => $record_date
         ];
diff --git a/app/Helpers/sanitizeInputArrayAdvanced_helper.php b/app/Helpers/sanitizeInputArrayAdvanced_helper.php
new file mode 100644
index 00000000..79d7df9b
--- /dev/null
+++ b/app/Helpers/sanitizeInputArrayAdvanced_helper.php
@@ -0,0 +1,84 @@
+<?php
+
+// use Normalizer;
+
+/**
+ * High security sanitizer
+ * - Normalizes unicode
+ * - Removes control chars
+ * - Removes null bytes
+ * - Removes invisible unicode tricks
+ * - Strips dangerous HTML
+ * - Prevents polyglot payloads
+ */
+function sanitizeInputArrayAdvanced(array $data, array $htmlAllowedFields = []): array
+{
+    foreach ($data as $k => $v) {
+
+        if (is_array($v)) {
+            $data[$k] = sanitizeInputArrayAdvanced($v, $htmlAllowedFields);
+            continue;
+        }
+
+        if (!is_string($v)) {
+            continue;
+        }
+
+        // 1. Unicode normalization (prevents homoglyph attacks)
+        if (class_exists('Normalizer')) {
+            $v = \Normalizer::normalize($v, \Normalizer::FORM_C);
+        }
+
+        // 2. Remove NULL bytes & control chars
+        $v = preg_replace('/[\x00-\x1F\x7F]/u', '', $v);
+
+        // 3. Remove invisible unicode chars (zero width, etc)
+        $v = preg_replace('/[\x{200B}-\x{200F}\x{202A}-\x{202E}\x{2060}-\x{206F}]/u', '', $v);
+
+        // 4. Decode HTML entities (so hidden payloads are exposed)
+        $v = html_entity_decode($v, ENT_QUOTES | ENT_HTML5, 'UTF-8');
+
+        // 5. Trim
+        $v = trim($v);
+
+        // 6. If this field is NOT allowed to contain HTML → strip aggressively
+        if (!in_array($k, $htmlAllowedFields, true)) {
+
+            // Remove all tags
+            $v = strip_tags($v);
+
+            // Kill any leftover JS protocol
+            $v = preg_replace('/(javascript:|data:|vbscript:)/i', '', $v);
+
+        } else {
+            // This is HTML-allowed field → run HTML sanitizer
+            $v = sanitizeTrustedHtml($v);
+        }
+
+        $data[$k] = $v;
+    }
+
+    return $data;
+}
+
+function sanitizeTrustedHtml(string $html): string
+{
+    // Allowed tags for email templates
+    $allowedTags = '<p><br><b><strong><i><u><em><ul><ol><li><table><thead><tbody><tr><td><th><a><img><div><span><h1><h2><h3><h4><h5><h6>';
+
+    // Strip all other tags
+    $html = strip_tags($html, $allowedTags);
+
+    // Remove event handlers like onclick, onerror, etc
+    $html = preg_replace('/\son\w+="[^"]*"/i', '', $html);
+    $html = preg_replace("/\son\w+='[^']*'/i", '', $html);
+
+    // Remove javascript: and data:
+    $html = preg_replace('/(javascript:|vbscript:|data:)/i', '', $html);
+
+    // Remove iframe, object, embed even if sneaked in
+    $html = preg_replace('/<(iframe|object|embed|script|style)[^>]*>.*?<\/\1>/is', '', $html);
+
+    return $html;
+}
+