diff --git a/src/FacturX.php b/src/FacturX.php
index e73a245..9a1036b 100644
--- a/src/FacturX.php
+++ b/src/FacturX.php
@@ -5,6 +5,7 @@
 // Factur-X Xml Stuff
 use Easybill\ZUGFeRD211\Builder;
 use Easybill\ZUGFeRD211\Model\Amount;
+use Easybill\ZUGFeRD211\Model\BinaryObject;
 use Easybill\ZUGFeRD211\Model\CreditorFinancialAccount;
 use Easybill\ZUGFeRD211\Model\CreditorFinancialInstitution;
 use Easybill\ZUGFeRD211\Model\CrossIndustryInvoice;
@@ -25,6 +26,7 @@
 use Easybill\ZUGFeRD211\Model\Note;
 use Easybill\ZUGFeRD211\Model\Quantity;
 
+use Easybill\ZUGFeRD211\Model\ReferencedDocument;
 use Easybill\ZUGFeRD211\Model\SupplyChainEvent;
 use Easybill\ZUGFeRD211\Model\SupplyChainTradeLineItem;
 use Easybill\ZUGFeRD211\Model\SupplyChainTradeTransaction;
@@ -366,4 +368,20 @@ public function addNote(string $content, ?string $subjectCode = null, ?string $c
     {
         $this->invoice->exchangedDocument->notes[] = Note::create($content, $subjectCode, $contentCode);
     }
+
+    public function addEmbeddedAttachment( ?string $id, ?string $scheme, ?string $filename, ?string $contents, ?string $mimeCode, ?string $description ){
+        // The attachement is correctly added but schematron fails, need to 
+        // $attachment = ReferencedDocument::create($id);
+        // $attachment->name = $description;
+        // $binary = new BinaryObject();
+        // $binary->filename=$filename;
+        // $binary->mimeCode=$mimeCode;
+        // $binary->value=base64_encode($contents);
+        // $attachment->attachmentBinaryObject = $binary;
+
+        // switch($scheme) {
+        //     // TODO, depending on the type of documents it could be attached
+        //     default : $this->invoice->supplyChainTradeTransaction->applicableHeaderTradeSettlement->invoiceReferencedDocument = $attachment;
+        // }
+    }
 }
\ No newline at end of file
diff --git a/src/Invoice.php b/src/Invoice.php
index 3227f4f..baa86f4 100644
--- a/src/Invoice.php
+++ b/src/Invoice.php
@@ -215,4 +215,8 @@ public function getPdf($pdf , $addFacturxLogo = false )
             $addFacturxLogo );
     }
 
+    public function addEmbeddedAttachment( ?string $id, ?string $scheme, ?string $filename, ?string $contents, ?string $mimeCode, ?string $description ){
+        $this->xmlGenerator->addEmbeddedAttachment( $id,$scheme, $filename, $contents, $mimeCode,  $description  );
+    }
+
 }
diff --git a/src/Ubl.php b/src/Ubl.php
index c23a122..31d7df8 100644
--- a/src/Ubl.php
+++ b/src/Ubl.php
@@ -3,6 +3,7 @@
 namespace DigitalInvoice;
 
 use DateTime;
+use Einvoicing\Attachment;
 use Einvoicing\Delivery;
 use Einvoicing\Exceptions\ValidationException;
 use Einvoicing\Identifier;
@@ -51,7 +52,7 @@ public function validate(string $xml, $schematron)
      * @return boolean
      */
     protected function euValidation(string $contents, string $type)  {
-
+        
         $ch = curl_init();
         curl_setopt_array($ch, [
             CURLOPT_URL => 'https://www.itb.ec.europa.eu/vitb/rest/invoice/api/validate',
@@ -189,4 +190,25 @@ public function addPaymentMean(PaymentMeansCode $typeCode, ?string $ibanId = nul
 
         $payment->addTransfer($transfer);
     }
+
+    public function addEmbeddedAttachment( ?string $id, ?string $scheme, ?string $filename, ?string $contents, ?string $mimeCode, ?string $description ){
+        // not implemented
+        $embeddedAttachment = new Attachment();
+        if($id){
+            $embeddedAttachment->setId( new Identifier($id, $scheme) );
+        }
+        if($filename){
+            $embeddedAttachment->setFilename($filename );
+        }
+        if($contents){
+            $embeddedAttachment->setContents($contents );
+        }
+        if($mimeCode){
+            $embeddedAttachment->setMimeCode($mimeCode );
+        }
+        if($description){
+            $embeddedAttachment->setDescription($description );
+        }
+        $this->invoice->addAttachment($embeddedAttachment);
+    }
 }
\ No newline at end of file
diff --git a/src/XmlGenerator.php b/src/XmlGenerator.php
index 1dd4767..f4f41d7 100644
--- a/src/XmlGenerator.php
+++ b/src/XmlGenerator.php
@@ -19,6 +19,7 @@ public function setBuyerAddress(string $lineOne, string $postCode, string $city,
     public function addItem(string $name, float $price, float $taxRatePercent, float  $quantity, UnitOfMeasurement $unit, ?string $globalID = null, ?string $globalIDCode =null ): float;
     public function addNote(string $content, ?string $subjectCode = null, ?string $contentCode = null);
     public function addPaymentMean(PaymentMeansCode $typeCode , ?string $ibanId = null,?string $accountName = null, ?string $bicId = null);
+    public function addEmbeddedAttachment( ?string $id, ?string $scheme, ?string $filename, ?string $contents, ?string $mimeCode, ?string $description );
 }
 
 
@@ -76,6 +77,12 @@ public function addTaxLine($rate , $totalLineBasis ){
 
     }
 
+    public function addEmbeddedAttachment( ?string $id, ?string $scheme, ?string $filename, ?string $contents, ?string $mimeCode, ?string $description ){
+        // not implemented
+    }
+
+    
+
 
 
     
diff --git a/test/InvoiceTest.php b/test/InvoiceTest.php
index e458d47..83eff6a 100644
--- a/test/InvoiceTest.php
+++ b/test/InvoiceTest.php
@@ -24,21 +24,21 @@ public function profilesProvider()
             [Zugferd::ZUGFERD_BASIC, true],
             [Zugferd::ZUGFERD_CONFORT, true],
             [Zugferd::ZUGFERD_EXTENDED, true],
-            [FacturX::XRECHNUNG, false],
-            [Ubl::PEPPOL, false],
-            [Ubl::NLCIUS, false],
-            [Ubl::CIUS_RO, false],
-            [Ubl::CIUS_IT, false],
-            [Ubl::CIUS_ES_FACE, false],
-            [Ubl::CIUS_AT_GOV, false],
-            [Ubl::CIUS_AT_NAT, false]
+            [FacturX::XRECHNUNG, false, false],
+            [Ubl::PEPPOL, false , true],
+            [Ubl::NLCIUS, false, true],
+            [Ubl::CIUS_RO, false, true],
+            [Ubl::CIUS_IT, false, true],
+            [Ubl::CIUS_ES_FACE, false, true],
+            [Ubl::CIUS_AT_GOV, false, true],
+            [Ubl::CIUS_AT_NAT, false, true]
         ];
     }
 
     /**
      * @dataProvider profilesProvider
      */
-    public function testInvoiceXml($profile, $isPdf): void
+    public function testInvoiceXml($profile, $isPdf, $embedPdf = false ): void
     {
         $invoice = new Invoice('123', new \Datetime('2023-11-07'), null ,  CurrencyCode::EURO , $profile);
 
@@ -81,6 +81,12 @@ public function testInvoiceXml($profile, $isPdf): void
 
         // add payment
         $invoice->addPaymentMean('58','MA2120300000000202051' , 'Youniwemi');
+        
+        // Embedding pdf
+        if ($embedPdf){
+            $pdfFile = file_get_contents(__DIR__.'/examples/basic.pdf');
+            $invoice->addEmbeddedAttachment('123', null, 'basic', $pdfFile, 'application/pdf', 'The pdf invoice');
+        }
 
         $xml = $invoice->getXml();
         self::assertNotEmpty($xml);
@@ -103,7 +109,6 @@ public function testInvoiceXml($profile, $isPdf): void
             } catch (\Exception $e) {
                 $this->fail('Error extractiong xml '. $e->getMessage());
             }
-
         }
 
         // A complete validation using schematron