diff --git a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
index bd6caafd15a..17fbe9cc9aa 100644
--- a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
@@ -1311,16 +1311,21 @@ class pdf_einstein extends ModelePDFCommandes
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
 		$title = $outputlangs->transnoentities($titlekey);
+		if (!empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$title .= " " . $outputlangs->convToOutputCharset($object->ref);
+		}
 		$pdf->MultiCell($w, 3, $title, '', 'R');
 
 		$pdf->SetFont('', 'B', $default_font_size);
 
 		$posy += 5;
-		$pdf->SetXY($posx, $posy);
-		$pdf->SetTextColor(0, 0, 60);
-		$pdf->MultiCell(100, 4, $outputlangs->transnoentities("Ref")." : ".$outputlangs->convToOutputCharset($object->ref), '', 'R');
+		if (empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$pdf->SetXY($posx, $posy);
+			$pdf->SetTextColor(0, 0, 60);
+			$pdf->MultiCell(100, 4, $outputlangs->transnoentities("Ref")." : ".$outputlangs->convToOutputCharset($object->ref), '', 'R');
 
-		$posy += 1;
+			$posy += 1;
+		}
 		$pdf->SetFont('', '', $default_font_size - 1);
 
 		if ($object->ref_client) {
diff --git a/htdocs/core/modules/contract/doc/pdf_strato.modules.php b/htdocs/core/modules/contract/doc/pdf_strato.modules.php
index c440cbf1cba..818a6aae64a 100644
--- a/htdocs/core/modules/contract/doc/pdf_strato.modules.php
+++ b/htdocs/core/modules/contract/doc/pdf_strato.modules.php
@@ -640,14 +640,19 @@ class pdf_strato extends ModelePDFContract
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
 		$title = $outputlangs->transnoentities("ContractCard");
+		if (!empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$title .= " " . $outputlangs->convToOutputCharset($object->ref);
+		}
 		$pdf->MultiCell(100, 4, $title, '', 'R');
 
 		$pdf->SetFont('', 'B', $default_font_size + 2);
 
 		$posy += 5;
-		$pdf->SetXY($posx, $posy);
-		$pdf->SetTextColor(0, 0, 60);
-		$pdf->MultiCell(100, 4, $outputlangs->transnoentities("Ref")." : ".$outputlangs->convToOutputCharset($object->ref), '', 'R');
+		if (empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$pdf->SetXY($posx, $posy);
+			$pdf->SetTextColor(0, 0, 60);
+			$pdf->MultiCell(100, 4, $outputlangs->transnoentities("Ref")." : ".$outputlangs->convToOutputCharset($object->ref), '', 'R');
+			}
 
 		$posy += 1;
 		$pdf->SetFont('', '', $default_font_size);
diff --git a/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php b/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php
index 79ceb166eed..b38bea345d3 100644
--- a/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php
+++ b/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php
@@ -953,15 +953,19 @@ class pdf_rouget extends ModelePdfExpedition
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
 		$title = $outputlangs->transnoentities("SendingSheet");
+		if (!empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$title .= " " . $outputlangs->convToOutputCharset($object->ref);
+		}
 		$pdf->MultiCell($w, 4, $title, '', 'R');
 
 		$pdf->SetFont('', '', $default_font_size + 1);
 
 		$posy += 5;
-
-		$pdf->SetXY($posx, $posy);
-		$pdf->SetTextColor(0, 0, 60);
-		$pdf->MultiCell($w, 4, $outputlangs->transnoentities("RefSending")." : ".$object->ref, '', 'R');
+		if (empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$pdf->SetXY($posx, $posy);
+			$pdf->SetTextColor(0, 0, 60);
+			$pdf->MultiCell($w, 4, $outputlangs->transnoentities("RefSending")." : ".$object->ref, '', 'R');
+		}
 
 		// Date planned delivery
 		if (!empty($object->date_delivery)) {
diff --git a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
index a01fab1dacf..0c9abb866a1 100644
--- a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
+++ b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
@@ -985,7 +985,9 @@ class pdf_crabe extends ModelePDFFactures
 		if ($object->type == 2) {
 			$title = $outputlangs->transnoentities("PaymentsBackAlreadyDone");
 		}
-
+		if (!empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$title .= " " . $outputlangs->convToOutputCharset($object->ref);
+		}
 		$pdf->SetFont('', '', $default_font_size - 3);
 		$pdf->SetXY($tab3_posx, $tab3_top - 4);
 		$pdf->MultiCell(60, 3, $title, 0, 'L', 0);
diff --git a/htdocs/core/modules/fichinter/doc/pdf_soleil.modules.php b/htdocs/core/modules/fichinter/doc/pdf_soleil.modules.php
index 08d57587625..23afd0e057a 100644
--- a/htdocs/core/modules/fichinter/doc/pdf_soleil.modules.php
+++ b/htdocs/core/modules/fichinter/doc/pdf_soleil.modules.php
@@ -596,14 +596,19 @@ class pdf_soleil extends ModelePDFFicheinter
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
 		$title = $outputlangs->transnoentities("InterventionCard");
+		if (!empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$title .= " " . $outputlangs->convToOutputCharset($object->ref);
+		}
 		$pdf->MultiCell(100, 4, $title, '', 'R');
 
 		$pdf->SetFont('', 'B', $default_font_size + 2);
 
 		$posy += 5;
-		$pdf->SetXY($posx, $posy);
-		$pdf->SetTextColor(0, 0, 60);
-		$pdf->MultiCell(100, 4, $outputlangs->transnoentities("Ref")." : ".$outputlangs->convToOutputCharset($object->ref), '', 'R');
+		if (empty($conf->global->MAIN_PDF_REF_IN_TITLE)) {
+			$pdf->SetXY($posx, $posy);
+			$pdf->SetTextColor(0, 0, 60);
+			$pdf->MultiCell(100, 4, $outputlangs->transnoentities("Ref")." : ".$outputlangs->convToOutputCharset($object->ref), '', 'R');
+		}
 
 		$posy += 1;
 		$pdf->SetFont('', '', $default_font_size);