diff --git a/check_appointments_schema.php b/check_appointments_schema.php
deleted file mode 100644
index e600f56..0000000
--- a/check_appointments_schema.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-$stmt = $db->query("DESCRIBE appointments");
-$columns = $stmt->fetchAll(PDO::FETCH_COLUMN);
-print_r($columns);
diff --git a/check_data.php b/check_data.php
deleted file mode 100644
index e234a30..0000000
--- a/check_data.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-
-// Fetch one patient
-$patient = $db->query("SELECT id, name FROM patients LIMIT 1")->fetch(PDO::FETCH_ASSOC);
-// Fetch one doctor (employee with position 'Doctor')
-$doctor = $db->query("
-    SELECT e.id, e.name_en 
-    FROM employees e 
-    JOIN positions p ON e.position_id = p.id 
-    WHERE UPPER(p.name_en) = 'DOCTOR' 
-    LIMIT 1")->fetch(PDO::FETCH_ASSOC);
-
-if ($patient && $doctor) {
-    echo "Found Patient: " . $patient['name'] . " (ID: " . $patient['id'] . ")\n";
-    echo "Found Doctor: " . $doctor['name_en'] . " (ID: " . $doctor['id'] . ")\n";
-} else {
-    echo "Could not find patient or doctor.\n";
-}
\ No newline at end of file
diff --git a/check_details_schema.php b/check_details_schema.php
deleted file mode 100644
index b24167e..0000000
--- a/check_details_schema.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-
-$tables = ['xray_inquiry_items', 'inquiry_tests', 'visit_prescriptions', 'laboratory_inquiries'];
-
-foreach ($tables as $table) {
-    try {
-        $stmt = $db->query("SHOW CREATE TABLE $table");
-        $row = $stmt->fetch(PDO::FETCH_ASSOC);
-        echo $row['Create Table'] . "\n\n";
-    } catch (Exception $e) {
-        echo "Table $table not found: " . $e->getMessage() . "\n\n";
-    }
-}
-
diff --git a/check_doctor_holidays_table.php b/check_doctor_holidays_table.php
deleted file mode 100644
index fa4fd71..0000000
--- a/check_doctor_holidays_table.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-require_once __DIR__ . '/db/config.php';
-$db = db();
-
-try {
-    $result = $db->query("SHOW COLUMNS FROM doctor_holidays");
-    if ($result) {
-        $columns = $result->fetchAll(PDO::FETCH_ASSOC);
-        echo "Table 'doctor_holidays' exists with columns:\n";
-        foreach ($columns as $col) {
-            echo "- " . $col['Field'] . " (" . $col['Type'] . ")\n";
-        }
-    } else {
-        echo "Table 'doctor_holidays' does not exist.\n";
-    }
-} catch (PDOException $e) {
-    echo "Error: " . $e->getMessage() . "\n";
-}
-
diff --git a/check_employees_schema.php b/check_employees_schema.php
deleted file mode 100644
index 6a85ddc..0000000
--- a/check_employees_schema.php
+++ /dev/null
@@ -1,8 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-$stmt = $db->query("DESCRIBE employees");
-$columns = $stmt->fetchAll(PDO::FETCH_COLUMN);
-echo "Columns in employees table:\n";
-print_r($columns);
-?>
\ No newline at end of file
diff --git a/check_nurses_schema.php b/check_nurses_schema.php
deleted file mode 100644
index 0b48c62..0000000
--- a/check_nurses_schema.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-$stmt = $db->query("DESCRIBE nurses");
-$columns = $stmt->fetchAll(PDO::FETCH_COLUMN);
-print_r($columns);
diff --git a/check_pharmacy_schema.php b/check_pharmacy_schema.php
deleted file mode 100644
index f317829..0000000
--- a/check_pharmacy_schema.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-require_once 'db/config.php';
-$pdo = db();
-
-$tables = ['drugs', 'suppliers', 'visit_prescriptions'];
-
-foreach ($tables as $table) {
-    echo "--- Table: $table ---
-";
-    try {
-        $stmt = $pdo->query("DESCRIBE $table");
-        $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
-        foreach ($columns as $col) {
-            echo "{$col['Field']} ({$col['Type']})
-";
-        }
-    } catch (PDOException $e) {
-        echo "Error describing $table: " . $e->getMessage() . "
-";
-    }
-    echo "
-";
-}
-
diff --git a/check_prices_schema.php b/check_prices_schema.php
deleted file mode 100644
index 4a4c7d9..0000000
--- a/check_prices_schema.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-
-$tables = ['laboratory_tests', 'xray_tests', 'drugs'];
-
-foreach ($tables as $table) {
-    try {
-        $stmt = $db->query("SHOW CREATE TABLE $table");
-        $row = $stmt->fetch(PDO::FETCH_ASSOC);
-        echo $row['Create Table'] . "\n\n";
-    } catch (Exception $e) {
-        echo "Table $table not found or error: " . $e->getMessage() . "\n\n";
-    }
-}
-
diff --git a/check_schema_billing.php b/check_schema_billing.php
deleted file mode 100644
index 9494a4c..0000000
--- a/check_schema_billing.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-
-$tables = ['services', 'xray_inquiries', 'laboratory_inquiries', 'visit_prescriptions', 'bill_items'];
-
-foreach ($tables as $table) {
-    try {
-        $stmt = $db->query("SHOW CREATE TABLE $table");
-        $row = $stmt->fetch(PDO::FETCH_ASSOC);
-        echo $row['Create Table'] . "\n\n";
-    } catch (Exception $e) {
-        echo "Table $table not found or error: " . $e->getMessage() . "\n\n";
-    }
-}
-
diff --git a/db/migrations/20260329_change_payment_method_type.sql b/db/migrations/20260329_change_payment_method_type.sql
new file mode 100644
index 0000000..57ee251
--- /dev/null
+++ b/db/migrations/20260329_change_payment_method_type.sql
@@ -0,0 +1 @@
+ALTER TABLE bills MODIFY COLUMN payment_method VARCHAR(50) DEFAULT 'Cash';
\ No newline at end of file
diff --git a/includes/actions.php b/includes/actions.php
index f8794ae..e89fe71 100644
--- a/includes/actions.php
+++ b/includes/actions.php
@@ -386,6 +386,15 @@ $sick_leave_start_date = !empty($_POST['sick_leave_start_date']) ? $_POST['sick_
                 $_SESSION['flash_message'] = __('delete') . ' ' . __('successfully');
                 $redirect = true;
             }
+        } elseif ($_POST['action'] === 'mark_paid') {
+            $bill_id = $_POST['bill_id'] ?? 0;
+            $payment_method = $_POST['payment_method'] ?? 'Cash';
+            if ($bill_id > 0) {
+                $stmt = $db->prepare("UPDATE bills SET status = 'Paid', payment_method = ? WHERE id = ?");
+                $stmt->execute([$payment_method, $bill_id]);
+                $_SESSION['flash_message'] = __('mark_as_paid') . ' ' . __('successfully');
+                $redirect = true;
+            }
         } elseif ($_POST['action'] === 'create_bill') {
             $patient_id = $_POST['patient_id'] ?? '';
             $visit_id = $_POST['visit_id'] ?: null;
diff --git a/includes/pages/billing.php b/includes/pages/billing.php
index d7d90b9..147e579 100644
--- a/includes/pages/billing.php
+++ b/includes/pages/billing.php
@@ -92,10 +92,23 @@ $bills = $stmt->fetchAll();
                         </td>
                         <td class="text-end px-4">
                             <?php if ($b['status'] === 'Pending'): ?>
-                            <form action="<?php echo $_SERVER['PHP_SELF']; ?>?section=billing" method="POST" class="d-inline">
+                            <form action="<?php echo $_SERVER['PHP_SELF']; ?>?section=billing" method="POST" class="d-inline-flex align-items-center gap-2">
                                 <input type="hidden" name="action" value="mark_paid">
                                 <input type="hidden" name="bill_id" value="<?php echo $b['id']; ?>">
-                                <button type="submit" class="btn btn-sm btn-success px-3">
+                                <select name="payment_method" class="form-select form-select-sm" style="width: auto;">
+                                    <?php 
+                                    $payment_types_setting = $settings['payment_types'] ?? 'Cash, Card, Insurance, Online, Other';
+                                    $payment_types = array_map('trim', explode(',', $payment_types_setting));
+                                    foreach ($payment_types as $pt): 
+                                        if (!empty($pt)):
+                                    ?>
+                                        <option value="<?php echo htmlspecialchars($pt); ?>"><?php echo htmlspecialchars($pt); ?></option>
+                                    <?php 
+                                        endif;
+                                    endforeach; 
+                                    ?>
+                                </select>
+                                <button type="submit" class="btn btn-sm btn-success px-3 text-nowrap">
                                     <i class="bi bi-check-circle me-1"></i> <?php echo __('mark_as_paid'); ?>
                                 </button>
                             </form>
diff --git a/includes/pages/dashboard.php b/includes/pages/dashboard.php
index 1b386a1..4ab2e5a 100644
--- a/includes/pages/dashboard.php
+++ b/includes/pages/dashboard.php
@@ -575,11 +575,16 @@ $appointments = $db->query($appointments_sql)->fetchAll();
                 <div class="row g-3 align-items-end">
                     <div class="col-md-6">
                         <label class="form-label small text-muted">Payment Method</label>
+                        <?php
+                        $payment_types_setting = $settings['payment_types'] ?? 'Cash, Card, Insurance, Online, Other';
+                        $payment_types = array_map('trim', explode(',', $payment_types_setting));
+                        ?>
                         <select id="checkout_payment_method" class="form-select">
-                            <option value="Cash">Cash</option>
-                            <option value="Card">Card</option>
-                            <option value="Online">Online</option>
-                            <option value="Insurance">Insurance Only</option>
+                            <?php foreach ($payment_types as $pt): ?>
+                                <?php if (!empty($pt)): ?>
+                                    <option value="<?php echo htmlspecialchars($pt); ?>"><?php echo htmlspecialchars($pt); ?></option>
+                                <?php endif; ?>
+                            <?php endforeach; ?>
                         </select>
                     </div>
                     <div class="col-md-6">
diff --git a/includes/pages/insurance.php b/includes/pages/insurance.php
index 686fadd..d51ff04 100644
--- a/includes/pages/insurance.php
+++ b/includes/pages/insurance.php
@@ -711,11 +711,16 @@ if (isset($_GET['ajax_search'])) {
                     <div class="row">
                         <div class="col-md-6 mb-3">
                             <label class="form-label"><?php echo __('payment_method'); ?></label>
+                            <?php
+                            $payment_types_setting = $settings['payment_types'] ?? 'Cash, Card, Insurance, Online, Other';
+                            $payment_types = array_map('trim', explode(',', $payment_types_setting));
+                            ?>
                             <select name="payment_method" class="form-select">
-                                <option value="Check"><?php echo __('payment_method_check'); ?></option>
-                                <option value="Bank Transfer"><?php echo __('payment_method_transfer'); ?></option>
-                                <option value="Cash"><?php echo __('payment_method_cash'); ?></option>
-                                <option value="Credit Card"><?php echo __('payment_method_card'); ?></option>
+                                <?php foreach ($payment_types as $pt): ?>
+                                    <?php if (!empty($pt)): ?>
+                                        <option value="<?php echo htmlspecialchars($pt); ?>"><?php echo htmlspecialchars($pt); ?></option>
+                                    <?php endif; ?>
+                                <?php endforeach; ?>
                             </select>
                         </div>
                         <div class="col-md-6 mb-3">
@@ -774,11 +779,16 @@ if (isset($_GET['ajax_search'])) {
                     <div class="row">
                         <div class="col-md-6 mb-3">
                             <label class="form-label"><?php echo __('payment_method'); ?></label>
+                            <?php
+                            $payment_types_setting = $settings['payment_types'] ?? 'Cash, Card, Insurance, Online, Other';
+                            $payment_types = array_map('trim', explode(',', $payment_types_setting));
+                            ?>
                             <select name="payment_method" id="editTransMethod" class="form-select">
-                                <option value="Check"><?php echo __('payment_method_check'); ?></option>
-                                <option value="Bank Transfer"><?php echo __('payment_method_transfer'); ?></option>
-                                <option value="Cash"><?php echo __('payment_method_cash'); ?></option>
-                                <option value="Credit Card"><?php echo __('payment_method_card'); ?></option>
+                                <?php foreach ($payment_types as $pt): ?>
+                                    <?php if (!empty($pt)): ?>
+                                        <option value="<?php echo htmlspecialchars($pt); ?>"><?php echo htmlspecialchars($pt); ?></option>
+                                    <?php endif; ?>
+                                <?php endforeach; ?>
                             </select>
                         </div>
                         <div class="col-md-6 mb-3">
diff --git a/includes/pages/pharmacy_pos.php b/includes/pages/pharmacy_pos.php
index 574fae6..67a2cd6 100644
--- a/includes/pages/pharmacy_pos.php
+++ b/includes/pages/pharmacy_pos.php
@@ -98,14 +98,21 @@ try {
                     <div class="mb-3">
                         <label class="form-label"><?php echo __('payment_method'); ?></label>
                         <div class="btn-group w-100" role="group">
-                            <input type="radio" class="btn-check" name="payment_method" id="pay_cash" value="cash" checked>
-                            <label class="btn btn-outline-primary" for="pay_cash"><i class="bi bi-cash me-1"></i> <?php echo __('cash'); ?></label>
-
-                            <input type="radio" class="btn-check" name="payment_method" id="pay_card" value="card">
-                            <label class="btn btn-outline-primary" for="pay_card"><i class="bi bi-credit-card me-1"></i> <?php echo __('card'); ?></label>
-
-                            <input type="radio" class="btn-check" name="payment_method" id="pay_insurance" value="insurance">
-                            <label class="btn btn-outline-primary" for="pay_insurance"><i class="bi bi-shield-check me-1"></i> <?php echo __('insurance'); ?></label>
+                            <?php 
+                            $payment_types_setting = $settings['payment_types'] ?? 'Cash, Card, Insurance, Online, Other';
+                            $payment_types = array_map('trim', explode(',', $payment_types_setting));
+                            $first = true;
+                            foreach ($payment_types as $pt): 
+                                if (!empty($pt)):
+                                    $id = 'pay_' . strtolower(str_replace(' ', '_', $pt));
+                            ?>
+                                <input type="radio" class="btn-check" name="payment_method" id="<?php echo $id; ?>" value="<?php echo htmlspecialchars($pt); ?>" <?php echo $first ? 'checked' : ''; ?>>
+                                <label class="btn btn-outline-primary" for="<?php echo $id; ?>"><?php echo htmlspecialchars($pt); ?></label>
+                            <?php 
+                                    $first = false;
+                                endif;
+                            endforeach; 
+                            ?>
                         </div>
                     </div>
                     
diff --git a/includes/pages/settings.php b/includes/pages/settings.php
index 467dea9..1fa1d99 100644
--- a/includes/pages/settings.php
+++ b/includes/pages/settings.php
@@ -136,6 +136,17 @@
                                         </div>
                                     </div>
 
+                                    
+                                    <!-- Payment Settings -->
+                                    <div class="col-12 mt-4"><hr></div>
+                                    <div class="col-12 mb-2">
+                                        <h6 class="fw-bold text-dark"><i class="bi bi-credit-card me-2"></i> <?php echo __('payment_settings'); ?></h6>
+                                    </div>
+                                    <div class="col-md-12">
+                                        <label for="payment_types" class="form-label fw-semibold text-muted small text-uppercase"> <?php echo __('payment_types'); ?></label>
+                                        <input type="text" class="form-control" id="payment_types" name="payment_types" value="<?php echo htmlspecialchars($settings['payment_types'] ?? 'Cash, Card, Insurance, Online, Other'); ?>" placeholder="Cash, Card, Insurance, Online, Other">
+                                        <div class="form-text text-muted"> <?php echo __('payment_types_desc'); ?></div>
+                                    </div>
                                     <!-- Currency Settings -->
                                     <div class="col-12 mt-4"><hr></div>
                                     <div class="col-12 mb-2">
diff --git a/lang.php b/lang.php
index e48918d..7f1a074 100644
--- a/lang.php
+++ b/lang.php
@@ -366,6 +366,9 @@ $translations = array (
     'timezone' => 'Timezone',
     'working_hours_start' => 'Working Hours Start',
     'working_hours_end' => 'Working Hours End',
+        'payment_settings' => 'Payment Settings',
+    'payment_types' => 'Payment Types',
+    'payment_types_desc' => 'Comma separated list of payment types (e.g. Cash, Card, Insurance, Online, Other)',
     'currency_settings' => 'Currency Settings',
     'currency_symbol' => 'Currency Symbol',
     'decimal_digits' => 'Decimal Digits',
@@ -897,6 +900,9 @@ $translations = array (
     'timezone' => 'المنطقة الزمنية',
     'working_hours_start' => 'بداية ساعات العمل',
     'working_hours_end' => 'نهاية ساعات العمل',
+        'payment_settings' => 'إعدادات الدفع',
+    'payment_types' => 'طرق الدفع',
+    'payment_types_desc' => 'قائمة مفصولة بفواصل لطرق الدفع (مثل: نقدي، بطاقة، تأمين، عبر الإنترنت، أخرى)',
     'currency_settings' => 'إعدادات العملة',
     'currency_symbol' => 'رمز العملة',
     'decimal_digits' => 'الخانات العشرية',
diff --git a/p.php b/p.php
deleted file mode 100644
index 5a63240..0000000
--- a/p.php
+++ /dev/null
@@ -1 +0,0 @@
-<?php $content = file_get_contents('lang.php'); $en_add = "'timezone' => 'Timezone',\n        'working_hours_start' => 'Working Hours Start',\n        'working_hours_end' => 'Working Hours End',"; $ar_add = "'timezone' => 'المنطقة الزمنية',\n        'working_hours_start' => 'بداية ساعات العمل',\n        'working_hours_end' => 'نهاية ساعات العمل',"; $content = str_replace("'company_vat_no' => 'VAT No',", "'company_vat_no' => 'VAT No',\n        " . $en_add, $content); $content = str_replace("'vat_no' => 'الرقم الضريبي',", "'vat_no' => 'الرقم الضريبي',\n        " . $ar_add, $content); file_put_contents('lang.php', $content); echo 'patched';
diff --git a/p2.php b/p2.php
deleted file mode 100644
index 63f1d33..0000000
--- a/p2.php
+++ /dev/null
@@ -1 +0,0 @@
-<?php $c = file_get_contents('includes/pages/settings.php'); $new_fields = "                            <!-- Timezone & Working Hours -->\n                            <div class=\"col-12 mt-4\"><hr></div>\n                            <div class=\"col-md-4\">\n                                <label for=\"timezone\" class=\"form-label fw-semibold text-muted small text-uppercase\"><?php echo __('timezone'); ?></label>\n                                <select class=\"form-select\" id=\"timezone\" name=\"timezone\">\n                                    <?php\n                                    \$timezones = DateTimeZone::listIdentifiers();\n                                    \$current_tz = \$settings['timezone'] ?? 'UTC';\n                                    foreach (\$timezones as \$tz) {\n                                        \$selected = (\$tz === \$current_tz) ? 'selected' : '';\n                                        echo \"<option value=\\\"{\$tz}\\\" {\$selected}>{\$tz}</option>\";\n                                    }\n                                    ?>\n                                </select>\n                            </div>\n                            <div class=\"col-md-4\">\n                                <label for=\"working_hours_start\" class=\"form-label fw-semibold text-muted small text-uppercase\"><?php echo __('working_hours_start'); ?></label>\n                                <input type=\"time\" class=\"form-control\" id=\"working_hours_start\" name=\"working_hours_start\" value=\"<?php echo htmlspecialchars(\$settings['working_hours_start'] ?? '08:00'); ?>\">\n                            </div>\n                            <div class=\"col-md-4\">\n                                <label for=\"working_hours_end\" class=\"form-label fw-semibold text-muted small text-uppercase\"><?php echo __('working_hours_end'); ?></label>\n                                <input type=\"time\" class=\"form-control\" id=\"working_hours_end\" name=\"working_hours_end\" value=\"<?php echo htmlspecialchars(\$settings['working_hours_end'] ?? '17:00'); ?>\">\n                            </div>"; $c = str_replace('<!-- Branding -->', $new_fields . "\n\n                            <!-- Branding -->", $c); file_put_contents('includes/pages/settings.php', $c); echo 'patched settings UI';
diff --git a/patch_final.php b/patch_final.php
deleted file mode 100644
index f2d2a4f..0000000
--- a/patch_final.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-$content = file_get_contents('db/migrations/20260322_merge_doctors_nurses_into_hr_final.sql');
-
-$content = str_replace(
-    'ALTER TABLE patient_queue ADD CONSTRAINT fk_queue_doctor_employee',
-    'ALTER TABLE patient_queue DROP FOREIGN KEY IF EXISTS fk_queue_doctor_employee;' . "\n" . 'ALTER TABLE patient_queue ADD CONSTRAINT fk_queue_doctor_employee',
-    $content
-);
-
-file_put_contents('db/migrations/20260322_merge_doctors_nurses_into_hr_final.sql', $content);
-echo "Patched final.sql\n";
-
diff --git a/test_groups.php b/test_groups.php
deleted file mode 100644
index f014536..0000000
--- a/test_groups.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-$section = 'test_groups';
-require_once __DIR__ . '/db/config.php';
-require_once __DIR__ . '/helpers.php';
-
-require_once __DIR__ . '/includes/auth.php';
-check_auth();
-
-$db = db();
-$lang = $_SESSION['lang'];
-
-require_once __DIR__ . '/includes/actions.php';
-require_once __DIR__ . '/includes/common_data.php';
-
-$is_ajax = (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest');
-
-if (!$is_ajax) {
-    require_once __DIR__ . '/includes/layout/header.php';
-}
-
-require_once __DIR__ . '/includes/pages/test_groups.php';
-
-if (!$is_ajax) {
-    require_once __DIR__ . '/includes/layout/footer.php';
-}
-?>
\ No newline at end of file
diff --git a/test_query.php b/test_query.php
deleted file mode 100644
index 0980ed5..0000000
--- a/test_query.php
+++ /dev/null
@@ -1,15 +0,0 @@
-<?php
-require_once 'db/config.php';
-$db = db();
-
-try {
-    $sql = "SELECT a.id, p.name as patient_name, a.start_time, a.patient_id, a.doctor_id
-            FROM appointments a 
-            JOIN patients p ON a.patient_id = p.id 
-            WHERE a.status = 'Scheduled' 
-            ORDER BY a.start_time ASC";
-    $scheduled_appointments = $db->query($sql)->fetchAll();
-    print_r($scheduled_appointments);
-} catch (PDOException $e) {
-    echo "Error: " . $e->getMessage();
-}