diff --git a/htdocs/comm/propal.php b/htdocs/comm/propal.php
index 97fd311a295..58a989c97d1 100644
--- a/htdocs/comm/propal.php
+++ b/htdocs/comm/propal.php
@@ -989,7 +989,7 @@ else if ($action == 'setdemandreason')
 else if ($action == 'setconditions')
 {
 	$object->fetch($id);
-	$result = $object->cond_reglement($_POST['cond_reglement_id']);
+	$result = $object->setPaymentTerms(GETPOST('cond_reglement_id','int'));
 }
 
 else if ($action == 'setremisepercent' && $user->rights->propale->creer)
diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 0eac6928c88..53d25bce4b0 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -1886,6 +1886,7 @@ class Propal extends CommonObject
 	 *
 	 *  @param		int		$cond_reglement_id	Id of new payment condition
 	 *  @return     int                    		>0 if OK, <0 if KO
+	 *  TODO deprecated
 	 */
 	function cond_reglement($cond_reglement_id)
 	{
diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index a828997f3a7..15fcee6efce 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -1980,6 +1980,7 @@ class Commande extends CommonObject
      *
      *	@param      int	$cond_reglement_id      Id de la nouvelle condition de reglement
      *	@return     int                    		>0 if OK, <0 if KO
+     *	TODO deprecated
      */
     function cond_reglement($cond_reglement_id)
     {
diff --git a/htdocs/commande/fiche.php b/htdocs/commande/fiche.php
index 86a33feb3f6..cbe513e87ae 100644
--- a/htdocs/commande/fiche.php
+++ b/htdocs/commande/fiche.php
@@ -470,7 +470,7 @@ if ($action == 'setdemandreason' && $user->rights->commande->creer)
 if ($action == 'setconditions' && $user->rights->commande->creer)
 {
     $object->fetch($id);
-    $result=$object->cond_reglement($_POST['cond_reglement_id']);
+    $result=$object->setPaymentTerms(GETPOST('cond_reglement_id','int'));
     if ($result < 0) dol_print_error($db,$object->error);
 }
 
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 9e0fb858902..c0b294ee6cd 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -267,6 +267,7 @@ if ($action == 'setinvoicedate')
     if ($result < 0) dol_print_error($db,$object->error);
 }
 
+// TODO obsolete ? not used
 if ($action == 'setpaymentterm')
 {
     $object->fetch($id);
@@ -278,7 +279,7 @@ if ($action == 'setpaymentterm')
 if ($action == 'setconditions')
 {
     $object->fetch($id);
-    $result=$object->cond_reglement($_POST['cond_reglement_id']);
+    $result=$object->setPaymentTerms(GETPOST('cond_reglement_id','int'));
     if ($result < 0) dol_print_error($db,$object->error);
 }
 
diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index a31a84c50f0..2db61ecbcd9 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -2692,6 +2692,7 @@ class Facture extends CommonObject
      *  @param      int		$cond_reglement_id      Id de la nouvelle condition de reglement
      * 	@param		date	$date					Date to force payment term
      *  @return     int                    			>0 si ok, <0 si ko
+     *  TODO deprecated, not used
      */
     function cond_reglement($cond_reglement_id,$date='')
     {
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 68e9a6d3270..8a4640f3562 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -861,8 +861,42 @@ abstract class CommonObject
             return -1;
         }
     }
-
-
+    
+    /**
+     *  Change the payments terms
+     *
+     *  @param		int		$id		Id of new payment terms
+     *  @return		int				>0 if OK, <0 if KO
+     */
+    function setPaymentTerms($id)
+    {
+    	dol_syslog(get_class($this).'::setPaymentTerms('.$id.')');
+    	if ($this->statut >= 0)
+    	{
+    		$sql = 'UPDATE '.MAIN_DB_PREFIX.$this->table_element;
+    		$sql .= ' SET fk_cond_reglement = '.$id;
+    		$sql .= ' WHERE rowid='.$this->id;
+    		
+    		if ($this->db->query($sql))
+    		{
+    			$this->cond_reglement_id = $id;
+    			return 1;
+    		}
+    		else
+    		{
+    			dol_syslog(get_class($this).'::setPaymentTerms Erreur '.$sql.' - '.$this->db->error());
+    			$this->error=$this->db->error();
+    			return -1;
+    		}
+    	}
+    	else
+    	{
+    		dol_syslog(get_class($this).'::setPaymentTerms, status of the object is incompatible');
+    		$this->error='Status of the object is incompatible '.$this->statut;
+    		return -2;
+    	}
+    }
+    
     /**
      *		Set last model used by doc generator
      *
diff --git a/htdocs/expedition/shipment.php b/htdocs/expedition/shipment.php
index 48b876b92b2..a6085b556b3 100644
--- a/htdocs/expedition/shipment.php
+++ b/htdocs/expedition/shipment.php
@@ -115,7 +115,7 @@ if ($action == 'setconditions' && $user->rights->commande->creer)
 {
 	$commande = new Commande($db);
 	$commande->fetch($id);
-	$result=$commande->cond_reglement(GETPOST('mode_reglement_id','int'));
+	$result=$commande->setPaymentTerms(GETPOST('cond_reglement_id','int'));
 	if ($result < 0) dol_print_error($db,$commande->error);
 }
 
diff --git a/htdocs/fourn/class/fournisseur.commande.class.php b/htdocs/fourn/class/fournisseur.commande.class.php
index 685009b19cb..9e70f8214ba 100644
--- a/htdocs/fourn/class/fournisseur.commande.class.php
+++ b/htdocs/fourn/class/fournisseur.commande.class.php
@@ -1305,6 +1305,7 @@ class CommandeFournisseur extends Commande
      *
      *  @param      int		$cond_reglement_id      Id de la nouvelle condition de reglement
      *  @return     int                    			>0 si ok, <0 si ko
+     *  TODO deprecated
      */
     function cond_reglement($cond_reglement_id)
     {
diff --git a/htdocs/fourn/commande/fiche.php b/htdocs/fourn/commande/fiche.php
index f9e3147efa9..555238b179d 100644
--- a/htdocs/fourn/commande/fiche.php
+++ b/htdocs/fourn/commande/fiche.php
@@ -77,7 +77,7 @@ $object = new CommandeFournisseur($db);
 if ($action == 'setconditions' && $user->rights->fournisseur->commande->creer)
 {
     $object->fetch($id);
-    $result=$object->cond_reglement($_POST['cond_reglement_id']);
+    $result=$object->setPaymentTerms(GETPOST('cond_reglement_id','int'));
 }
 
 // mode de reglement