diff --git a/htdocs/adherents/card_subscriptions.php b/htdocs/adherents/card_subscriptions.php
index 29b6ef1f1f2..2e8822b75d2 100644
--- a/htdocs/adherents/card_subscriptions.php
+++ b/htdocs/adherents/card_subscriptions.php
@@ -338,7 +338,7 @@ if ($user->rights->adherent->cotisation->creer && $action == 'cotisation' && ! $
                 }
 
                 // Create draft invoice
-                $invoice->type=0;
+                $invoice->type= Facture::TYPE_STANDARD;
                 $invoice->cond_reglement_id=$customer->cond_reglement_id;
                 if (empty($invoice->cond_reglement_id))
                 {
diff --git a/htdocs/cashdesk/validation_verif.php b/htdocs/cashdesk/validation_verif.php
index ffaa01b7a94..7cd29a54ec5 100644
--- a/htdocs/cashdesk/validation_verif.php
+++ b/htdocs/cashdesk/validation_verif.php
@@ -53,7 +53,7 @@ switch ($action)
 
 		$invoice=new Facture($db);
 		$invoice->date=dol_now();
-		$invoice->type=0;
+		$invoice->type= Facture::TYPE_STANDARD;
 		$num=$invoice->getNextNumRef($company);
 
 		$obj_facturation->numInvoice($num);
diff --git a/htdocs/compta/facture/apercu.php b/htdocs/compta/facture/apercu.php
index ab508e50035..afe5586ab13 100644
--- a/htdocs/compta/facture/apercu.php
+++ b/htdocs/compta/facture/apercu.php
@@ -107,13 +107,13 @@ if ($id > 0 || ! empty($ref))
         // Type
         print '<tr><td>'.$langs->trans('Type').'</td><td colspan="5">';
         print $object->getLibType();
-        if ($object->type == 1)
+        if ($object->type == Facture::TYPE_REPLACEMENT)
         {
             $facreplaced=new Facture($db);
             $facreplaced->fetch($object->fk_facture_source);
             print ' ('.$langs->transnoentities("ReplaceInvoice",$facreplaced->getNomUrl(1)).')';
         }
-        if ($object->type == 2)
+        if ($object->type == Facture::TYPE_CREDIT_NOTE)
         {
             $facusing=new Facture($db);
             $facusing->fetch($object->fk_facture_source);
@@ -155,7 +155,7 @@ if ($id > 0 || ! empty($ref))
         if ($absolute_discount > 0)
         {
             print '. ';
-            if ($object->statut > 0 || $object->type == 2 || $object->type == 3)
+            if ($object->statut > 0 || $object->type == Facture::TYPE_CREDIT_NOTE || $object->type == Facture::TYPE_DEPOSIT)
             {
                 if ($object->statut == 0)
                 {
@@ -164,7 +164,7 @@ if ($id > 0 || ! empty($ref))
                 }
                 else
                 {
-                    if ($object->statut < 1 || $object->type == 2 || $object->type == 3)
+                    if ($object->statut < 1 || $object->type == Facture::TYPE_CREDIT_NOTE || $object->type == Facture::TYPE_DEPOSIT)
                     {
                         $text=$langs->trans("CompanyHasAbsoluteDiscount",price($absolute_discount),$langs->transnoentities("Currency".$conf->currency));
                         print '<br>'.$text.'.<br>';
diff --git a/htdocs/compta/facture/prelevement.php b/htdocs/compta/facture/prelevement.php
index 48b08946469..740bd8ea11a 100644
--- a/htdocs/compta/facture/prelevement.php
+++ b/htdocs/compta/facture/prelevement.php
@@ -183,13 +183,13 @@ if ($object->id > 0)
 	// Type
 	print '<tr><td>'.$langs->trans('Type').'</td><td colspan="5">';
 	print $object->getLibType();
-	if ($object->type == 1)
+	if ($object->type == Facture::TYPE_REPLACEMENT)
 	{
 		$facreplaced=new Facture($db);
 		$facreplaced->fetch($object->fk_facture_source);
 		print ' ('.$langs->transnoentities("ReplaceInvoice",$facreplaced->getNomUrl(1)).')';
 	}
-	if ($object->type == 2)
+	if ($object->type == Facture::TYPE_CREDIT_NOTE)
 	{
 		$facusing=new Facture($db);
 		$facusing->fetch($object->fk_facture_source);
@@ -228,7 +228,7 @@ if ($object->id > 0)
 	print '. ';
 	if ($absolute_discount > 0)
 	{
-		if ($object->statut > 0 || $object->type == 2 || $object->type == 3)
+		if ($object->statut > 0 || $object->type == Facture::TYPE_CREDIT_NOTE || $object->type == Facture::TYPE_DEPOSIT)
 		{
 			if ($object->statut == 0)
 			{
@@ -236,7 +236,7 @@ if ($object->id > 0)
 			}
 			else
 			{
-				if ($object->statut < 1 || $object->type == 2 || $object->type == 3)
+				if ($object->statut < 1 || $object->type == Facture::TYPE_CREDIT_NOTE || $object->type == Facture::TYPE_DEPOSIT)
 				{
 					$text=$langs->trans("CompanyHasAbsoluteDiscount",price($absolute_discount),$langs->transnoentities("Currency".$conf->currency));
 					print '<br>'.$text.'.<br>';
@@ -260,9 +260,9 @@ if ($object->id > 0)
 	if ($absolute_creditnote > 0)
 	{
 		// If validated, we show link "add credit note to payment"
-		if ($object->statut != 1 || $object->type == 2 || $object->type == 3)
+		if ($object->statut != 1 || $object->type == Facture::TYPE_DEPOSIT || $object->type == Facture::TYPE_CREDIT_NOTE)
 		{
-			if ($object->statut == 0 && $object->type != 3)
+			if ($object->statut == 0 && $object->type != Facture::TYPE_DEPOSIT)
 			{
 				$text=$langs->trans("CompanyHasCreditNote",price($absolute_creditnote),$langs->transnoentities("Currency".$conf->currency));
 				print $form->textwithpicto($text,$langs->trans("CreditNoteDepositUse"));
@@ -285,11 +285,11 @@ if ($object->id > 0)
 	print '<table class="nobordernopadding" width="100%"><tr><td>';
 	print $langs->trans('Date');
 	print '</td>';
-	if ($object->type != 2 && $action != 'editinvoicedate' && ! empty($object->brouillon) && $user->rights->facture->creer) print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editinvoicedate&amp;id='.$object->id.'">'.img_edit($langs->trans('SetDate'),1).'</a></td>';
+	if ($object->type != Facture::TYPE_CREDIT_NOTE && $action != 'editinvoicedate' && ! empty($object->brouillon) && $user->rights->facture->creer) print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editinvoicedate&amp;id='.$object->id.'">'.img_edit($langs->trans('SetDate'),1).'</a></td>';
 	print '</tr></table>';
 	print '</td><td colspan="3">';
 
-	if ($object->type != 2)
+	if ($object->type != Facture::TYPE_CREDIT_NOTE)
 	{
 		if ($action == 'editinvoicedate')
 		{
@@ -312,10 +312,10 @@ if ($object->id > 0)
 	print '<table class="nobordernopadding" width="100%"><tr><td>';
 	print $langs->trans('DateMaxPayment');
 	print '</td>';
-	if ($object->type != 2 && $action != 'editpaymentterm' && ! empty($object->brouillon) && $user->rights->facture->creer) print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editpaymentterm&amp;id='.$object->id.'">'.img_edit($langs->trans('SetDate'),1).'</a></td>';
+	if ($object->type != Facture::TYPE_CREDIT_NOTE && $action != 'editpaymentterm' && ! empty($object->brouillon) && $user->rights->facture->creer) print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editpaymentterm&amp;id='.$object->id.'">'.img_edit($langs->trans('SetDate'),1).'</a></td>';
 	print '</tr></table>';
 	print '</td><td colspan="3">';
-	if ($object->type != 2)
+	if ($object->type != Facture::TYPE_CREDIT_NOTE)
 	{
 		if ($action == 'editpaymentterm')
 		{
@@ -338,10 +338,10 @@ if ($object->id > 0)
 	print '<table class="nobordernopadding" width="100%"><tr><td>';
 	print $langs->trans('PaymentConditionsShort');
 	print '</td>';
-	if ($object->type != 2 && $action != 'editconditions' && ! empty($object->brouillon) && $user->rights->facture->creer) print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editconditions&amp;id='.$object->id.'">'.img_edit($langs->trans('SetConditions'),1).'</a></td>';
+	if ($object->type != Facture::TYPE_CREDIT_NOTE && $action != 'editconditions' && ! empty($object->brouillon) && $user->rights->facture->creer) print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editconditions&amp;id='.$object->id.'">'.img_edit($langs->trans('SetConditions'),1).'</a></td>';
 	print '</tr></table>';
 	print '</td><td colspan="3">';
-	if ($object->type != 2)
+	if ($object->type != Facture::TYPE_CREDIT_NOTE)
 	{
 		if ($action == 'editconditions')
 		{