diff --git a/htdocs/compta/prelevement/card.php b/htdocs/compta/prelevement/card.php
index d4311abe112..a076299b4cd 100644
--- a/htdocs/compta/prelevement/card.php
+++ b/htdocs/compta/prelevement/card.php
@@ -238,7 +238,14 @@ if ($id > 0 || $ref) {
 		$modulepart = 'paymentbybanktransfer';
 	}
 	print '<a data-ajax="false" href="'.DOL_URL_ROOT.'/document.php?type=text/plain&amp;modulepart='.$modulepart.'&amp;file='.urlencode($relativepath).'">'.$relativepath.'</a>';
-	print '</td></tr></table>';
+	print '</td></tr>';
+
+	// Other attributes
+	$parameters = array();
+	$reshook = $hookmanager->executeHooks('formObjectOptions', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
+	print $hookmanager->resPrint;
+
+	print '</table>';
 
 	print '</div>';
 
diff --git a/htdocs/hrm/class/position.class.php b/htdocs/hrm/class/position.class.php
index 2401791bb5f..d9df0624b0b 100644
--- a/htdocs/hrm/class/position.class.php
+++ b/htdocs/hrm/class/position.class.php
@@ -109,7 +109,7 @@ class Position extends CommonObject
 		'date_creation' => array('type'=>'datetime', 'label'=>'DateCreation', 'enabled'=>'1', 'position'=>500, 'notnull'=>1, 'visible'=>-2,),
 		'tms' => array('type'=>'timestamp', 'label'=>'DateModification', 'enabled'=>'1', 'position'=>501, 'notnull'=>0, 'visible'=>-2,),
 		'fk_contrat' => array('type'=>'integer:Contrat:contrat/class/contrat.class.php', 'label'=>'fk_contrat', 'enabled'=>'1', 'position'=>50, 'notnull'=>0, 'visible'=>0,),
-		'fk_user' => array('type'=>'integer:User:user/class/user.class.php', 'label'=>'Employee', 'enabled'=>'1', 'position'=>55, 'notnull'=>0, 'visible'=>1,),
+		'fk_user' => array('type'=>'integer:User:user/class/user.class.php', 'label'=>'Employee', 'enabled'=>'1', 'position'=>55, 'notnull'=>1, 'visible'=>1, 'default'=>0),
 		'fk_job' => array('type'=>'integer:Job:/hrm/class/job.class.php', 'label'=>'Job', 'enabled'=>'1', 'position'=>56, 'notnull'=>1, 'visible'=>1,),
 		'date_start' => array('type'=>'date', 'label'=>'DateStart', 'enabled'=>'1', 'position'=>51, 'notnull'=>1, 'visible'=>1,),
 		'date_end' => array('type'=>'date', 'label'=>'DateEnd', 'enabled'=>'1', 'position'=>52, 'notnull'=>0, 'visible'=>1,),
@@ -843,6 +843,76 @@ class Position extends CommonObject
 	}
 
 	/**
+	 * Return HTML string to put an input field into a page
+	 * Code very similar with showInputField of extra fields
+	 *
+	 * @param  array   		$val	       Array of properties for field to show
+	 * @param  string  		$key           Key of attribute
+	 * @param  string  		$value         Preselected value to show (for date type it must be in timestamp format, for amount or price it must be a php numeric value)
+	 * @param  string  		$moreparam     To add more parameters on html input tag
+	 * @param  string  		$keysuffix     Prefix string to add into name and id of field (can be used to avoid duplicate names)
+	 * @param  string  		$keyprefix     Suffix string to add into name and id of field (can be used to avoid duplicate names)
+	 * @param  string|int	$morecss       Value for css to define style/length of field. May also be a numeric.
+	 * @return string
+	 */
+	public function showInputField($val, $key, $value, $moreparam = '', $keysuffix = '', $keyprefix = '', $morecss = 0, $nonewbutton = 0)
+	{
+		global $langs;
+
+		if ($key == 'fk_user') {
+			$vacantId = $keyprefix.$key.'vacant'.$keysuffix;
+
+			$out = parent::showInputField($val, $key, $value, $moreparam, $keysuffix, $keyprefix, $morecss);
+			$out .= '<label class="nowrap position-fk-user classfortooltip" title="'.dol_escape_js($langs->trans('VacantCheckboxHelper')).'"><input type="checkbox" id="'.$vacantId.'" name="'.$vacantId.'" />&nbsp;'.$langs->trans("Vacant").'</label>';
+
+			?>
+			<script type="text/javascript">
+				$(document).ready(function () {
+					var checkbox = $('#<?php print $vacantId; ?>');
+					var searchfkuser = $('#<?php print $keyprefix.$key.$keysuffix; ?>');
+					checkbox.click(function () {
+						if (checkbox.prop('checked')) {
+							searchfkuser.val(0).trigger('change');
+							searchfkuser.prop('disabled', 1);
+						} else {
+							searchfkuser.prop('disabled', 0);
+						}
+					});
+				});
+			</script>
+			<?php
+		} else {
+			$out = parent::showInputField($val, $key, $value, $moreparam, $keysuffix, $keyprefix, $morecss);
+		}
+
+		return $out;
+	}
+
+	/**
+	 * Return HTML string to show a field into a page
+	 * Code very similar with showOutputField of extra fields
+	 *
+	 * @param  array   $val		       Array of properties of field to show
+	 * @param  string  $key            Key of attribute
+	 * @param  string  $value          Preselected value to show (for date type it must be in timestamp format, for amount or price it must be a php numeric value)
+	 * @param  string  $moreparam      To add more parametes on html input tag
+	 * @param  string  $keysuffix      Prefix string to add into name and id of field (can be used to avoid duplicate names)
+	 * @param  string  $keyprefix      Suffix string to add into name and id of field (can be used to avoid duplicate names)
+	 * @param  mixed   $morecss        Value for css to define size. May also be a numeric.
+	 * @return string
+	 */
+	public function showOutputField($val, $key, $value, $moreparam = '', $keysuffix = '', $keyprefix = '', $morecss = '')
+	{
+		global $langs;
+
+		if ($key == 'fk_user' && $this->fk_user == 0) {
+			return $langs->trans("VacantPosition");
+		}
+		return parent::showOutputField($val, $key, $value, $moreparam, $keysuffix, $keyprefix, $morecss);
+	}
+
+
+		/**
 	 *    Load the info information in the object
 	 *
 	 * @param int $id Id of object
@@ -1072,7 +1142,7 @@ require_once DOL_DOCUMENT_ROOT . '/core/class/commonobjectline.class.php';
 class PositionLine extends CommonObjectLine
 {
 	// To complete with content of an object PositionLine
-	// We should have a field rowid, fk_position and position
+	// We should have a field rowid , fk_position and position
 
 	/**
 	 * @var int  Does object support extrafields ? 0=No, 1=Yes
diff --git a/htdocs/hrm/position_list.php b/htdocs/hrm/position_list.php
index d6ed72c2612..1585ed1e03f 100644
--- a/htdocs/hrm/position_list.php
+++ b/htdocs/hrm/position_list.php
@@ -270,6 +270,10 @@ foreach ($search as $key => $val) {
 		}
 	}
 }
+$vacant = GETPOST('search_fk_uservacant', 'alphanohtml') === 'on';
+if ($vacant) {
+	$sql .= ' AND t.fk_user = 0';
+}
 if ($search_all) {
 	$sql .= natural_search(array_keys($fieldstosearchall), $search_all);
 }
diff --git a/htdocs/langs/en_US/hrm.lang b/htdocs/langs/en_US/hrm.lang
index c571ec6ca8a..ab3628026c5 100644
--- a/htdocs/langs/en_US/hrm.lang
+++ b/htdocs/langs/en_US/hrm.lang
@@ -79,3 +79,6 @@ NoEval=No evaluation done for this employee
 HowManyUserWithThisMaxNote=Number of users with this rank
 HighestRank=Highest rank
 SkillComparison=Skill comparison
+ActionsOnJob=Events on this job
+VacantPosition=job vacancy
+VacantCheckboxHelper=Checking this option will show unfilled positions (job vacancy)
diff --git a/htdocs/langs/fr_FR/hrm.lang b/htdocs/langs/fr_FR/hrm.lang
index cab3c7c11af..dca9ca4deb6 100644
--- a/htdocs/langs/fr_FR/hrm.lang
+++ b/htdocs/langs/fr_FR/hrm.lang
@@ -79,4 +79,6 @@ NoEval=Aucune évaluation effectuée pour cet employé
 HowManyUserWithThisMaxNote=Nombre d'employés avec ce niveau
 HighestRank=Plus haut niveau
 SkillComparison=Comparaison des compétences
-ActionsOnJob=Événements sur cet emploi
\ No newline at end of file
+ActionsOnJob=Événements sur cet emploi
+VacantPosition=Poste vacant
+VacantCheckboxHelper=Cocher cette option affichera le(s) poste(s) comme non pourvu(s)
diff --git a/htdocs/loan/card.php b/htdocs/loan/card.php
index 88701e35166..4bc539c1ff0 100644
--- a/htdocs/loan/card.php
+++ b/htdocs/loan/card.php
@@ -618,6 +618,11 @@ if ($id > 0) {
 		}
 		print '</tr>';
 
+		// Other attributes
+		$parameters = array();
+		$reshook = $hookmanager->executeHooks('formObjectOptions', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
+		print $hookmanager->resPrint;
+
 		print '</table>';
 
 		print '</div>';
diff --git a/htdocs/opensurvey/card.php b/htdocs/opensurvey/card.php
index 773571b7b1c..3f822679350 100644
--- a/htdocs/opensurvey/card.php
+++ b/htdocs/opensurvey/card.php
@@ -54,6 +54,9 @@ if ($result <= 0) {
 	exit;
 }
 
+// Initialize technical object to manage hooks of page. Note that conf->hooks_modules contains array of hook context
+$hookmanager->initHooks(array('surveycard', 'globalcard'));
+
 $expiredate = dol_mktime(0, 0, 0, GETPOST('expiremonth'), GETPOST('expireday'), GETPOST('expireyear'));
 
 
@@ -338,6 +341,11 @@ if ($action != 'edit') {
 
 print '</td></tr>';
 
+// Other attributes
+$parameters = array();
+$reshook = $hookmanager->executeHooks('formObjectOptions', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
+print $hookmanager->resPrint;
+
 print '</table>';
 print '</div>';