diff --git a/htdocs/adherents/class/api_members.class.php b/htdocs/adherents/class/api_members.class.php
index d57a01510d4..f5efbd8582e 100644
--- a/htdocs/adherents/class/api_members.class.php
+++ b/htdocs/adherents/class/api_members.class.php
@@ -382,14 +382,18 @@ class Members extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 
-		if (!$member->delete($member->id, DolibarrApiAccess::$user)) {
-			throw new RestException(401, 'error when deleting member');
+
+		$res = $member->delete($member->id, DolibarrApiAccess::$user);
+		if($res < 0) {
+			throw new RestException(500, "Can't delete, error occurs");
+		}elseif($res == 0) {
+			throw new RestException(409, "Can't delete, that product is probably used");
 		}
 
 		return array(
 			'success' => array(
 				'code' => 200,
-				'message' => 'member deleted'
+				'message' => 'Member deleted'
 			)
 		);
 	}
diff --git a/htdocs/adherents/class/api_memberstypes.class.php b/htdocs/adherents/class/api_memberstypes.class.php
index b02a81dc5c9..a4ce0ddf1f4 100644
--- a/htdocs/adherents/class/api_memberstypes.class.php
+++ b/htdocs/adherents/class/api_memberstypes.class.php
@@ -228,14 +228,17 @@ class MembersTypes extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 
-		if (!$membertype->delete()) {
-			throw new RestException(401, 'error when deleting member type');
+		$res = $membertype->delete();
+		if($res < 0) {
+			throw new RestException(500, "Can't delete, error occurs");
+		}elseif($res == 0) {
+			throw new RestException(409, "Can't delete, that product is probably used");
 		}
 
 		return array(
 			'success' => array(
 				'code' => 200,
-				'message' => 'member type deleted'
+				'message' => 'Member type deleted'
 			)
 		);
 	}
diff --git a/htdocs/adherents/class/api_subscriptions.class.php b/htdocs/adherents/class/api_subscriptions.class.php
index 831be2882f1..1cada6c7f3e 100644
--- a/htdocs/adherents/class/api_subscriptions.class.php
+++ b/htdocs/adherents/class/api_subscriptions.class.php
@@ -214,14 +214,17 @@ class Subscriptions extends DolibarrApi
 			throw new RestException(404, 'Subscription not found');
 		}
 
-		if (!$subscription->delete(DolibarrApiAccess::$user)) {
-			throw new RestException(401, 'error when deleting subscription');
+		$res = $subscription->delete(DolibarrApiAccess::$user);
+		if($res < 0) {
+			throw new RestException(500, "Can't delete, error occurs");
+		}elseif($res == 0) {
+			throw new RestException(409, "Can't delete, that product is probably used");
 		}
 
 		return array(
 			'success' => array(
 				'code' => 200,
-				'message' => 'subscription deleted'
+				'message' => 'Subscription deleted'
 			)
 		);
 	}
diff --git a/htdocs/product/class/api_products.class.php b/htdocs/product/class/api_products.class.php
index 6283b692a28..b3dd2c019df 100644
--- a/htdocs/product/class/api_products.class.php
+++ b/htdocs/product/class/api_products.class.php
@@ -435,7 +435,19 @@ class Products extends DolibarrApi
 		global $user;
 		$user = DolibarrApiAccess::$user;
 
-		return $this->product->delete(DolibarrApiAccess::$user);
+		$res = $this->product->delete(DolibarrApiAccess::$user);
+		if($res < 0) {
+			throw new RestException(500, "Can't delete, error occurs");
+		}elseif($res == 0) {
+			throw new RestException(409, "Can't delete, that product is probably used");
+		}
+
+		return array(
+			'success' => array(
+				'code' => 200,
+				'message' => 'Object deleted'
+			)
+		);
 	}
 
 	/**
diff --git a/htdocs/societe/class/api_thirdparties.class.php b/htdocs/societe/class/api_thirdparties.class.php
index 0257b692b62..4646175878c 100644
--- a/htdocs/societe/class/api_thirdparties.class.php
+++ b/htdocs/societe/class/api_thirdparties.class.php
@@ -525,7 +525,22 @@ class Thirdparties extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 		$this->company->oldcopy = clone $this->company;
-		return $this->company->delete($id);
+
+		$res = $this->company->delete($id);
+		if($res < 0) {
+			throw new RestException(500, "Can't delete, error occurs");
+		}elseif($res == 0) {
+			throw new RestException(409, "Can't delete, that product is probably used");
+		}
+
+		return array(
+			'success' => array(
+				'code' => 200,
+				'message' => 'Object deleted'
+			)
+		);
+
+
 	}
 
 	/**
diff --git a/htdocs/user/class/api_users.class.php b/htdocs/user/class/api_users.class.php
index e0cbd849092..83cd88f8ade 100644
--- a/htdocs/user/class/api_users.class.php
+++ b/htdocs/user/class/api_users.class.php
@@ -628,7 +628,18 @@ class Users extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 		$this->useraccount->oldcopy = clone $this->useraccount;
-		return $this->useraccount->delete(DolibarrApiAccess::$user);
+
+		if (!$this->useraccount->delete(DolibarrApiAccess::$user)) {
+			throw new RestException(500);
+		}
+
+		return array(
+			'success' => array(
+				'code' => 200,
+				'message' => 'Ticket deleted'
+			)
+		);
+
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore