diff --git a/app/Mail/InvalidSerialMail.php b/app/Mail/InvalidSerialMail.php
new file mode 100644
index 0000000..c6333d7
--- /dev/null
+++ b/app/Mail/InvalidSerialMail.php
@@ -0,0 +1,402 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+// class InvalidSerialMail extends Mailable
+// {
+//     use Queueable, SerializesModels;
+
+//     /**
+//      * Create a new message instance.
+//      */
+//    public $serial;
+//    public $invoiceNumber;
+//    public $plantName;
+//    public $invoiceType;
+
+//     public $greetings;
+
+
+//     public function __construct($serial, $invoiceNumber, $plantName, $invoiceType)
+//     {
+//         $this->serial = $serial;
+//         $this->invoiceNumber = $invoiceNumber;
+//         $this->plantName = $plantName;
+//         $this->invoiceType = $invoiceType;
+//     }
+
+//     /**
+//      * Get the message envelope.
+//      */
+//     public function envelope(): Envelope
+//     {
+//         return new Envelope(
+//             subject: 'Invalid Serial Mail',
+//         );
+//     }
+
+//     /**
+//      * Get the message content definition.
+//      */
+//     public function content(): Content
+//     {
+//         $greeting = "Dear Sir/Madam,<br><br>Please note that the scanned serial number format appears to be incorrect.";
+
+//         return new Content(
+//             view: 'mail.invalid-serial',
+//             with: [
+//                 'company' => "CRI Digital Manufacturing Solutions",
+//                 'greeting' => $greeting,
+//                 'wishes' => "Thanks & Regards,<br>CRI Digital Manufacturing Solutions"
+//             ],
+//         );
+//     }
+
+//     /**
+//      * Get the attachments for the message.
+//      *
+//      * @return array<int, \Illuminate\Mail\Mailables\Attachment>
+//      */
+//     public function attachments(): array
+//     {
+//         return [];
+//     }
+// }
+
+class InvalidSerialMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public $serial;
+    public $invoiceNumber;
+    public $mplantName;
+    public $mInvoiceType;
+    public $mailType;     // new
+    public $greeting;
+    public $subjectLine;
+
+    public $itemCode;
+
+    /**
+     * Create a new message instance.
+     */
+    public function __construct($serial, $invoiceNumber, $mplantName, $mInvoiceType, $itemCode, $mailType = 'InvalidFormat')
+    {
+        $this->serial = $serial;
+        $this->invoiceNumber = $invoiceNumber;
+        $this->mplantName = $mplantName;
+        $this->mInvoiceType = $mInvoiceType;
+        $this->mailType = $mailType;
+        $this->itemCode = $itemCode;
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        // dynamic subject based on mail type
+        switch ($this->mailType) {
+            case 'NotFound':
+                $this->subjectLine = "Serial Number Not Found ({$this->mplantName})";
+                break;
+            case 'NotFoundInvoice':
+                $this->subjectLine = "Serial Number Not Found in Invoice ({$this->mplantName})";
+                break;
+            case 'NotFoundItemS':
+                $this->subjectLine = "Item Code Not Found ({$this->mplantName})";
+                break;
+            case 'NotValidPackage':
+                $this->subjectLine = "Not Valid Package ({$this->mplantName})";
+                break;
+            case 'InvalidMaterialFormat':
+                $this->subjectLine = "Invalid Qr code format Found material ({$this->mplantName})";
+                break;
+            case 'DuplicateMotorQR':
+                $this->subjectLine = "Duplicate Serial Number ({$this->mplantName})";
+                break;
+            case 'NotMotorQR':
+                $this->subjectLine = "Item Code doesn't have Motor QR ({$this->mplantName})";
+                break;
+            case 'CompletedSerialInvoice':
+                $this->subjectLine = "Completed Serial Invoice ({$this->mplantName})";
+                break;
+            case 'NotPumpQR':
+                $this->subjectLine = "Item Code doesn't have Pump QR ({$this->mplantName})";
+                break;
+            case 'DuplicatePumpQR':
+                $this->subjectLine = "Duplicate Serial Number ({$this->mplantName})";
+                break;
+            case 'CSerialInvoice':
+                $this->subjectLine = "Completed Serial Invoice ({$this->mplantName})";
+                break;
+            case 'MissingPanelBox':
+                $this->subjectLine = "Missing Panel Box ({$this->mplantName})";
+                break;
+            case 'DuplicateCapacitorQR':
+                $this->subjectLine = "Duplicate Capacitor QR ({$this->mplantName})";
+                break;
+            case 'UnknownPumpsetQR':
+                $this->subjectLine = "Unknown PumpSet QR ({$this->mplantName})";
+                break;
+            case 'DuplicatePumpsetQR':
+                $this->subjectLine = "Duplicate PumpSet QR ({$this->mplantName})";
+                break;
+            case 'ComSerInv':
+                $this->subjectLine = "Completed Serial Invoice ({$this->mplantName})";
+                break;
+            case 'InvalidFormat':
+            default:
+                $this->subjectLine = "Invalid Serial Format Found ({$this->mplantName})";
+                break;
+        }
+
+        return new Envelope(
+            subject: $this->subjectLine,
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        // dynamic greeting/message body
+        switch ($this->mailType) {
+            case 'NotFound':
+                $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    The scanned Serial Number <b>{$this->serial}</b> was not found in the database
+                    for the plant <b>{$this->mplantName}</b>.<br><br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br><br>
+                    Please verify the serial number.
+                ";
+                break;
+            case 'NotFoundInvoice':
+                $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    The scanned Serial Number <b>'{$this->serial}'</b> was not found in the Invoice Number <b>'{$this->invoiceNumber}'</b>
+                    for the plant <b>{$this->mplantName}</b>.<br><br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br><br>
+                    Please verify the serial number.
+                ";
+                break;
+            case 'NotFoundItemS':
+                $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Item Code <b>'{$this->itemCode}'</b> with Serial Number<b>'{$this->serial}'</b> not found in sticker master
+                    for the plant <b>{$this->mplantName}</b>.<br><br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br><br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br><br>
+                    Please verify the Item Code.
+                ";
+                break;
+            case 'NotValidPackage':
+                $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned Item Code<b>'{$this->itemCode}'</b> doesn't have valid package type to proceed!
+                    for the plant <b>{$this->mplantName}</b>.<br><br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br><br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br><br>
+                    Please verify the Item Code.
+                ";
+                break;
+            case 'InvalidMaterialFormat':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Please note that the scanned serial number format appears to be incorrect.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'DuplicateMotorQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned 'Motor' serial number <b>{$this->serial}</b> already completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'NotMotorQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned Item Code <b>{$this->itemCode}</b> doesn't have 'Motor' QR to proceed!<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'CompletedSerialInvoice':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Serial invoice <b>'{$this->invoiceNumber}'</b> completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'NotPumpQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned Item Code <b>'{$this->itemCode}'</b> doesn't have 'Pump' QR to proceed!<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'DuplicatePumpQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned 'Pump' serial number already completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'CSerialInvoice':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Serial invoice <b>'{$this->invoiceNumber}'</b> completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'MissingPanelBox':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned Item Code <b>'{$this->itemCode}'</b> doesn't have 'Panel Box Code' to proceed!<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'DuplicateCapacitorQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned 'Capacitor' serial number already completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'UnknownPumpsetQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned Item Code <b>'{$this->itemCode}'</b> doesn't have 'Pump Set' QR to proceed!<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'DuplicatePumpsetQR':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Scanned 'Pump Set' serial number already completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'ComSerInv':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Serial invoice <b>'{$this->invoiceNumber}'</b> completed the scanning process.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'ItemNotFound':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Item code <b>'{$this->itemCode}'</b> not found in database.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'ItemNotFoundDB':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Item code <b>'{$this->itemCode}'</b> not found in database for choosed plant.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'ItemNotValidMaterialType':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Item code <b>'{$this->itemCode}'</b> doesn't have a valid material type.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'ItemNotInvoice':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Item code <b>'{$this->itemCode}'</b> doesn't exist in invoice.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'ItemNotInvoice':
+                 $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Item code <b>'{$this->itemCode}'</b> doesn't exist in invoice.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}<br>
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+            case 'InvalidFormat':
+            default:
+                $this->greeting = "
+                    Dear Sir/Madam,<br><br>
+                    Please note that the scanned serial number format appears to be incorrect.<br>
+                    <b>Plant:</b> {$this->mplantName}<br>
+                    <b>Invoice Type:</b> {$this->mInvoiceType}
+                    <b>Invoice Number:</b> {$this->invoiceNumber}<br>
+                    <b>Scanned QR Code:</b> {$this->serial}<br>
+                ";
+                break;
+        }
+
+        return new Content(
+            view: 'mail.invalid-serial',
+            with: [
+                'company' => "CRI Digital Manufacturing Solutions",
+                'greeting' => $this->greeting,
+                'wishes' => "Thanks & Regards,<br>CRI Digital Manufacturing Solutions",
+            ],
+        );
+    }
+}