diff --git a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
index 25fe672d8e9..6e3d887cbce 100644
--- a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
@@ -1315,6 +1315,30 @@ class pdf_einstein extends ModelePDFCommandes
 			$pdf->MultiCell(100, 3, $outputlangs->transnoentities("RefCustomer")." : ".$outputlangs->convToOutputCharset($object->ref_client), '', 'R');
 		}
 
+		if (! empty($conf->global->PDF_SHOW_PROJECT_TITLE))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("Project")." : " . (empty($object->project->title)?'':$object->projet->title), '', 'R');
+			}
+		}
+
+		if (! empty($conf->global->PDF_SHOW_PROJECT))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefProject")." : " . (empty($object->project->ref)?'':$object->projet->ref), '', 'R');
+			}
+		}
+
 		$posy += 4;
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
diff --git a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
index 6b6d6e1a890..f4fc2b3cb2f 100644
--- a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
@@ -1475,7 +1475,32 @@ class pdf_eratosthene extends ModelePDFCommandes
 			$pdf->MultiCell(100, 3, $outputlangs->transnoentities("RefCustomer")." : ".$outputlangs->convToOutputCharset($object->ref_client), '', 'R');
 		}
 
+		if (! empty($conf->global->PDF_SHOW_PROJECT_TITLE))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("Project")." : " . (empty($object->project->title)?'':$object->projet->title), '', 'R');
+			}
+		}
+
+		if (! empty($conf->global->PDF_SHOW_PROJECT))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefProject")." : " . (empty($object->project->ref)?'':$object->projet->ref), '', 'R');
+			}
+		}
+
 		$posy += 4;
+
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
 		$pdf->MultiCell(100, 3, $outputlangs->transnoentities("OrderDate")." : ".dol_print_date($object->date, "day", false, $outputlangs, true), '', 'R');
diff --git a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
index f0a3230595e..6e8918920a6 100644
--- a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
+++ b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
@@ -1707,6 +1707,30 @@ class pdf_crabe extends ModelePDFFactures
 			$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefCustomer")." : ".$outputlangs->convToOutputCharset($object->ref_client), '', 'R');
 		}
 
+		if (! empty($conf->global->PDF_SHOW_PROJECT_TITLE))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("Project")." : " . (empty($object->project->title)?'':$object->projet->title), '', 'R');
+			}
+		}
+
+		if (! empty($conf->global->PDF_SHOW_PROJECT))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefProject")." : " . (empty($object->project->ref)?'':$object->projet->ref), '', 'R');
+			}
+		}
+
 		$objectidnext = $object->getIdReplacingInvoice('validated');
 		if ($object->type == 0 && $objectidnext)
 		{
diff --git a/htdocs/core/modules/facture/doc/pdf_sponge.modules.php b/htdocs/core/modules/facture/doc/pdf_sponge.modules.php
index 341772d6de4..37fa1cb3ae2 100644
--- a/htdocs/core/modules/facture/doc/pdf_sponge.modules.php
+++ b/htdocs/core/modules/facture/doc/pdf_sponge.modules.php
@@ -1963,6 +1963,30 @@ class pdf_sponge extends ModelePDFFactures
 			$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefCustomer")." : ".$outputlangs->convToOutputCharset($object->ref_client), '', 'R');
 		}
 
+		if (! empty($conf->global->PDF_SHOW_PROJECT_TITLE))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("Project")." : " . (empty($object->project->title)?'':$object->projet->title), '', 'R');
+			}
+		}
+
+		if (! empty($conf->global->PDF_SHOW_PROJECT))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefProject")." : " . (empty($object->project->ref)?'':$object->projet->ref), '', 'R');
+			}
+		}
+
 		$objectidnext = $object->getIdReplacingInvoice('validated');
 		if ($object->type == 0 && $objectidnext)
 		{
diff --git a/htdocs/core/modules/propale/doc/pdf_azur.modules.php b/htdocs/core/modules/propale/doc/pdf_azur.modules.php
index 9ed7a065cc1..3810ad67237 100644
--- a/htdocs/core/modules/propale/doc/pdf_azur.modules.php
+++ b/htdocs/core/modules/propale/doc/pdf_azur.modules.php
@@ -1528,6 +1528,30 @@ class pdf_azur extends ModelePDFPropales
 			$pdf->MultiCell(100, 3, $outputlangs->transnoentities("RefCustomer")." : ".$outputlangs->convToOutputCharset($object->ref_client), '', 'R');
 		}
 
+		if (! empty($conf->global->PDF_SHOW_PROJECT_TITLE))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("Project")." : " . (empty($object->project->title)?'':$object->projet->title), '', 'R');
+			}
+		}
+
+		if (! empty($conf->global->PDF_SHOW_PROJECT))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefProject")." : " . (empty($object->project->ref)?'':$object->projet->ref), '', 'R');
+			}
+		}
+
 		$posy += 4;
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);
diff --git a/htdocs/core/modules/propale/doc/pdf_cyan.modules.php b/htdocs/core/modules/propale/doc/pdf_cyan.modules.php
index af04a52e21f..07ceb461803 100644
--- a/htdocs/core/modules/propale/doc/pdf_cyan.modules.php
+++ b/htdocs/core/modules/propale/doc/pdf_cyan.modules.php
@@ -1588,6 +1588,30 @@ class pdf_cyan extends ModelePDFPropales
 			$pdf->MultiCell(100, 3, $outputlangs->transnoentities("RefCustomer")." : ".$outputlangs->convToOutputCharset($object->ref_client), '', 'R');
 		}
 
+		if (! empty($conf->global->PDF_SHOW_PROJECT_TITLE))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("Project")." : " . (empty($object->project->title)?'':$object->projet->title), '', 'R');
+			}
+		}
+
+		if (! empty($conf->global->PDF_SHOW_PROJECT))
+		{
+			$object->fetch_projet();
+			if (! empty($object->project->ref))
+			{
+				$posy+=3;
+				$pdf->SetXY($posx, $posy);
+				$pdf->SetTextColor(0, 0, 60);
+				$pdf->MultiCell($w, 3, $outputlangs->transnoentities("RefProject")." : " . (empty($object->project->ref)?'':$object->projet->ref), '', 'R');
+			}
+		}
+
 		$posy += 4;
 		$pdf->SetXY($posx, $posy);
 		$pdf->SetTextColor(0, 0, 60);