diff --git a/htdocs/compta/sociales/card.php b/htdocs/compta/sociales/card.php
index 83a6a8f3b3a..c26c62fb7ed 100644
--- a/htdocs/compta/sociales/card.php
+++ b/htdocs/compta/sociales/card.php
@@ -180,7 +180,7 @@ if ($action == 'add' && $user->rights->tax->charges->creer) {
 }
 
 
-if ($action == 'update' && !$_POST["cancel"] && $user->rights->tax->charges->creer) {
+if ($action == 'update' && !GETPOST("cancel") && $user->rights->tax->charges->creer) {
 	$amount = price2num(GETPOST('amount'), 'MT');
 
 	if (!$dateech) {
diff --git a/htdocs/compta/tva/card.php b/htdocs/compta/tva/card.php
index c4daeb801c6..5470685e8e0 100755
--- a/htdocs/compta/tva/card.php
+++ b/htdocs/compta/tva/card.php
@@ -260,7 +260,7 @@ if ($action == 'confirm_delete' && $confirm == 'yes') {
 	}
 }
 
-if ($action == 'update' && !$_POST["cancel"] && $user->rights->tax->charges->creer) {
+if ($action == 'update' && !GETPOST("cancel") && $user->rights->tax->charges->creer) {
 	$amount = price2num(GETPOST('amount'));
 
 	if (empty($amount)) {
diff --git a/htdocs/contact/perso.php b/htdocs/contact/perso.php
index 8d2969a1370..807d54c4651 100644
--- a/htdocs/contact/perso.php
+++ b/htdocs/contact/perso.php
@@ -45,7 +45,7 @@ $object = new Contact($db);
  * Action
  */
 
-if ($action == 'update' && !$_POST["cancel"] && $user->rights->societe->contact->creer) {
+if ($action == 'update' && !GETPOST("cancel") && $user->rights->societe->contact->creer) {
 	$ret = $object->fetch($id);
 
 	// Note: Correct date should be completed with location to have exact GM time of birth.
diff --git a/htdocs/eventorganization/conferenceorbooth_card.php b/htdocs/eventorganization/conferenceorbooth_card.php
index 495d0334a10..29bbd0f19bd 100644
--- a/htdocs/eventorganization/conferenceorbooth_card.php
+++ b/htdocs/eventorganization/conferenceorbooth_card.php
@@ -202,9 +202,6 @@ if ($action == 'create') {
 
 	print dol_get_fiche_head(array(), '');
 
-	// Set some default values
-	//if (! GETPOSTISSET('fieldname')) $_POST['fieldname'] = 'myvalue';
-
 	print '<table class="border centpercent tableforfieldcreate">'."\n";
 
 	// Common attributes
diff --git a/htdocs/expedition/card.php b/htdocs/expedition/card.php
index 7e10b5b5f1f..c543ef40880 100644
--- a/htdocs/expedition/card.php
+++ b/htdocs/expedition/card.php
@@ -281,8 +281,8 @@ if (empty($reshook)) {
 
 					$totalqty += $subtotalqty;
 				} else {
-					// No detail were provided for lots
-					if (!empty($_POST[$qty])) {
+					// No detail were provided for lots, so if a qty was provided, we can show an error.
+					if (GETPOST($qty)) {
 						// We try to set an amount
 						// Case we dont use the list of available qty for each warehouse/lot
 						// GUI does not allow this yet
diff --git a/htdocs/projet/card.php b/htdocs/projet/card.php
index 3999e448730..d65ea3499fc 100644
--- a/htdocs/projet/card.php
+++ b/htdocs/projet/card.php
@@ -52,7 +52,7 @@ $status = GETPOST('status', 'int');
 $opp_status = GETPOST('opp_status', 'int');
 $opp_percent = price2num(GETPOST('opp_percent', 'alpha'));
 
-if ($id == '' && $ref == '' && ($action != "create" && $action != "add" && $action != "update" && !$_POST["cancel"])) {
+if ($id == '' && $ref == '' && ($action != "create" && $action != "add" && $action != "update" && !GETPOST("cancel"))) {
 	accessforbidden();
 }
 
diff --git a/htdocs/projet/tasks/task.php b/htdocs/projet/tasks/task.php
index 6ec9f7d3126..430210fe11b 100644
--- a/htdocs/projet/tasks/task.php
+++ b/htdocs/projet/tasks/task.php
@@ -73,7 +73,7 @@ if ($reshook < 0) {
  * Actions
  */
 
-if ($action == 'update' && !$_POST["cancel"] && $user->rights->projet->creer) {
+if ($action == 'update' && !GETPOST("cancel") && $user->rights->projet->creer) {
 	$error = 0;
 
 	if (empty($taskref)) {
diff --git a/htdocs/salaries/card.php b/htdocs/salaries/card.php
index 775221caeb2..e1225f15258 100755
--- a/htdocs/salaries/card.php
+++ b/htdocs/salaries/card.php
@@ -282,7 +282,7 @@ if ($action == 'confirm_delete') {
 }
 
 
-if ($action == 'update' && !$_POST["cancel"] && $user->rights->salaries->write) {
+if ($action == 'update' && !GETPOST("cancel") && $user->rights->salaries->write) {
 	$amount = price2num(GETPOST('amount'), 'MT', 2);
 
 	if (empty($amount)) {
diff --git a/htdocs/user/note.php b/htdocs/user/note.php
index e0c23842347..1a375343e05 100644
--- a/htdocs/user/note.php
+++ b/htdocs/user/note.php
@@ -67,7 +67,7 @@ if ($reshook < 0) {
 }
 
 if (empty($reshook)) {
-	if ($action == 'update' && $user->rights->user->user->creer && !$_POST["cancel"]) {
+	if ($action == 'update' && $user->rights->user->user->creer && !GETPOST("cancel")) {
 		$db->begin();
 
 		$res = $object->update_note(dol_html_entity_decode(GETPOST('note_private', 'restricthtml'), ENT_QUOTES | ENT_HTML5));
diff --git a/htdocs/user/param_ihm.php b/htdocs/user/param_ihm.php
index 228066b7051..2856f787b52 100644
--- a/htdocs/user/param_ihm.php
+++ b/htdocs/user/param_ihm.php
@@ -90,7 +90,7 @@ if ($reshook < 0) {
 
 if (empty($reshook)) {
 	if ($action == 'update' && ($caneditfield || !empty($user->admin))) {
-		if (!$_POST["cancel"]) {
+		if (!GETPOST("cancel")) {
 			$tabparam = array();
 
 			if (GETPOST("check_MAIN_LANDING_PAGE") == "on") {
diff --git a/htdocs/workstation/workstation_card.php b/htdocs/workstation/workstation_card.php
index 61686423d4c..b64f15e1f76 100755
--- a/htdocs/workstation/workstation_card.php
+++ b/htdocs/workstation/workstation_card.php
@@ -208,9 +208,6 @@ if ($action == 'create') {
 
 	print dol_get_fiche_head(array(), '');
 
-	// Set some default values
-	//if (! GETPOSTISSET('fieldname')) $_POST['fieldname'] = 'myvalue';
-
 	print '<table class="border centpercent tableforfieldcreate">'."\n";
 
 	// Common attributes