diff --git a/ChangeLog b/ChangeLog
index f1a44ef58e03c90478e1e6775fc9caed2237a1ac..69f6556871d7a84cade6a6fc3839289abb9ae206 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -16,6 +16,7 @@ For users:
 - New: total per vat rate are available as tags for ODT templates.
 - New: Add more types for extra parameters (lists, phone, emails, checkbox, prices)
 - New: Some part of interface use more CSS3 (ie: agenda)
+- New: [ task #707 ] Create option ProfIdx are mandatory to validate a invoice
   
 For developers:
 - System of menu managers has been rewritten to reduce code to do same things. 
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 212429be67e2bb00992540a098a08a5624b30d5a..1753eb4b75a5b429776bc1cdae3acc6372a526df 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -366,6 +366,22 @@ else if ($action == 'confirm_valid' && $confirm == 'yes' && $user->rights->factu
     $object->fetch_thirdparty();
 
     // Check parameters
+    
+    // Check for  mandatory prof id
+    for ($i = 1; $i < 5; $i++)
+    {
+    	 
+    	$idprof_mandatory ='SOCIETE_IDPROF'.($i).'_INVOICE_MANDATORY';
+    	if (! $object->thirdparty->idprof.$i && ! empty($conf->global->$idprof_mandatory))
+        {
+        	if (! $error) $langs->load("errors");
+    		$error++;
+    	
+    		setEventMessage($langs->trans('ErrorProdIdIsMandatory',$langs->transcountry('ProfId'.$i, $object->thirdparty->country_code)),'errors');
+    	}
+    } 
+    
+    //Check for warehouse
     if ($object->type != 3 && ! empty($conf->global->STOCK_CALCULATE_ON_BILL) && $object->hasProductsOrServices(1))
     {
         if (! $idwarehouse || $idwarehouse == -1)
@@ -375,7 +391,7 @@ else if ($action == 'confirm_valid' && $confirm == 'yes' && $user->rights->factu
             $action='';
         }
     }
-
+    
     if (! $error)
     {
         $result = $object->validate($user,'',$idwarehouse);
diff --git a/htdocs/langs/ca_ES/admin.lang b/htdocs/langs/ca_ES/admin.lang
index 5bbc3472c98ff713b06ef4121a5b59ddb41f90dc..a80324836cc4f56d6ff205957c58702ee6cdaca8 100644
--- a/htdocs/langs/ca_ES/admin.lang
+++ b/htdocs/langs/ca_ES/admin.lang
@@ -962,7 +962,8 @@ DocumentModelOdt=Generació des dels documents amb format OpenDocument (Arxiu .O
 WatermarkOnDraft=Marca d'aigua en els documents esborrany
 CompanyIdProfChecker=Règles sobre els ID professionals
 MustBeUnique=Ha de ser únic?
-MustBeMandatory=Ha de ser obligatori?
+MustBeMandatory=Ha de ser obligatori per a crear tercers?
+MustBeInvoiceMandatory=Ha de ser obligatori per a validar factures?
 Miscellanous=Miscel·lània
 ##### Webcal setup #####
 WebCalSetup=Configuració d'enllaç amb el calendari webcalendar
diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index cc5d50c5139da0d23570f5a36544b42aa94037c7..ce66a55f94412e8f7153cb287b7c3afcfc880ae8 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -978,7 +978,8 @@ DocumentModelOdt=Generate documents from OpenDocuments templates (.ODT files for
 WatermarkOnDraft=Watermark on draft document
 CompanyIdProfChecker=Rules ono Professional Ids
 MustBeUnique=Must be unique ?
-MustBeMandatory=Must be mandatory ?
+MustBeMandatory=Must be mandatory to create thirds?
+MustBeInvoiceMandatory=Must be mandatory to validate invoices?
 Miscellanous=Miscellaneous
 ##### Webcal setup #####
 WebCalSetup=Webcalendar link setup
diff --git a/htdocs/langs/es_ES/admin.lang b/htdocs/langs/es_ES/admin.lang
index cbf151937425c54561bea378346d22bb28e12528..8013b56c2fb072c5e05561d6fdbea481a8e71a8c 100644
--- a/htdocs/langs/es_ES/admin.lang
+++ b/htdocs/langs/es_ES/admin.lang
@@ -964,7 +964,8 @@ DocumentModelOdt=Generación desde los documentos OpenDocument (Archivo .ODT Ope
 WatermarkOnDraft=Marca de agua en los documentos borrador
 CompanyIdProfChecker=Reglas sobre los ID profesionales
 MustBeUnique=¿Debe ser único?
-MustBeMandatory=¿Debe ser obligatorio?
+MustBeMandatory=¿Debe ser obligatorio para crear terceros?
+MustBeInvoiceMandatory=¿Debe ser obligatorio para validar facturas?
 Miscellanous=Miscelánea
 ##### Webcal setup #####
 WebCalSetup=Configuración de enlace con el calendario Webcalendar
diff --git a/htdocs/langs/fr_FR/admin.lang b/htdocs/langs/fr_FR/admin.lang
index 46df03e5c63b0053eb1620cdff28a137341ccf91..f0e8198086dbbaf4b5c28b3b429dba13700c9e0e 100644
--- a/htdocs/langs/fr_FR/admin.lang
+++ b/htdocs/langs/fr_FR/admin.lang
@@ -975,7 +975,8 @@ DocumentModelOdt=Genération depuis des modèles OpenDocument (Fichier .ODT Open
 WatermarkOnDraft=Filigrane sur les documents brouillons
 CompanyIdProfChecker=Règles sur les Ids professionnels 
 MustBeUnique=Doit être unique ?
-MustBeMandatory=Doit être obligatoire?
+MustBeMandatory=Doit être obligatoire pour creer tiers ?
+MustBeInvoiceMandatory=Doit être obligatoire pour valider factures ?
 Miscellanous=Divers
 ##### Webcal setup #####
 WebCalSetup= Configuration du lien vers le calendrier Webcalendar
diff --git a/htdocs/societe/admin/societe.php b/htdocs/societe/admin/societe.php
index 1b0efa2c4b263446d3f6941472479a2d249e1663..1cd6fef8b4ba50bc31e73f4dd78709d984eca331 100644
--- a/htdocs/societe/admin/societe.php
+++ b/htdocs/societe/admin/societe.php
@@ -210,7 +210,7 @@ if ($action == 'setprofid')
 	}
 }
 
-//Activate ProfId
+//Activate ProfId mandatory
 if ($action == 'setprofidmandatory')
 {
 	$status = GETPOST('status','alpha');
@@ -227,6 +227,22 @@ if ($action == 'setprofidmandatory')
 	}
 }
 
+//Activate ProfId invoice mandatory
+if ($action == 'setprofidinvoicemandatory')
+{
+	$status = GETPOST('status','alpha');
+
+	$idprof="SOCIETE_IDPROF".$value."_INVOICE_MANDATORY";
+	if (dolibarr_set_const($db, $idprof,$status,'chaine',0,'',$conf->entity) > 0)
+	{
+		header("Location: ".$_SERVER["PHP_SELF"]);
+		exit;
+	}
+	else
+	{
+		dol_print_error($db);
+	}
+}
 
 /*
  * 	View
@@ -554,6 +570,7 @@ print '<td>'.$langs->trans("Name").'</td>';
 print '<td>'.$langs->trans("Description").'</td>';
 print '<td align="center">'.$langs->trans("MustBeUnique").'</td>';
 print '<td align="center">'.$langs->trans("MustBeMandatory").'</td>';
+print '<td align="center">'.$langs->trans("MustBeInvoiceMandatory").'</td>';
 print "</tr>\n";
 
 $profid[0][0]=$langs->trans("ProfId1");
@@ -586,8 +603,10 @@ while ($i < $nbofloop)
 	
 		$idprof_unique ='SOCIETE_IDPROF'.($i+1).'_UNIQUE';
 		$idprof_mandatory ='SOCIETE_IDPROF'.($i+1).'_MANDATORY';
+		$idprof_invoice_mandatory ='SOCIETE_IDPROF'.($i+1).'_INVOICE_MANDATORY';
 		$verif=(empty($conf->global->$idprof_unique)?false:true);
 		$mandatory=(empty($conf->global->$idprof_mandatory)?false:true);
+		$invoice_mandatory=(empty($conf->global->$idprof_invoice_mandatory)?false:true);
 	
 		if ($verif)
 		{
@@ -614,6 +633,20 @@ while ($i < $nbofloop)
 			print img_picto($langs->trans("Disabled"),'switch_off');
 			print '</a></td>';
 		}
+		
+		if ($invoice_mandatory)
+		{
+			print '<td align="center"><a href="'.$_SERVER['PHP_SELF'].'?action=setprofidinvoicemandatory&value='.($i+1).'&status=0">';
+			print img_picto($langs->trans("Activated"),'switch_on');
+			print '</a></td>';
+		}
+		else
+		{
+			print '<td align="center"><a href="'.$_SERVER['PHP_SELF'].'?action=setprofidinvoicemandatory&value='.($i+1).'&status=1">';
+			print img_picto($langs->trans("Disabled"),'switch_off');
+			print '</a></td>';
+		}
+		
 		print "</tr>\n";
 	}
 	$i++;