diff --git a/htdocs/compta/facture/class/api_invoices.class.php b/htdocs/compta/facture/class/api_invoices.class.php
index 4c27ac54b58..e620d30e087 100644
--- a/htdocs/compta/facture/class/api_invoices.class.php
+++ b/htdocs/compta/facture/class/api_invoices.class.php
@@ -1401,11 +1401,11 @@ class Invoices extends DolibarrApi
      *
      * @param array   $arrayofamounts     {@from body}  Array with id of invoices with amount to pay for each invoice
      * @param string  $datepaye           {@from body}  Payment date        {@type timestamp}
-     * @param int     $paiementid         {@from body}  Payment mode Id {@min 1}
+     * @param int     $paymentid          {@from body}  Payment mode Id {@min 1}
      * @param string  $closepaidinvoices  {@from body}  Close paid invoices {@choice yes,no}
      * @param int     $accountid          {@from body}  Account Id {@min 1}
-     * @param string  $num_paiement       {@from body}  Payment number (optional)
-     * @param string  $comment            {@from body}  Note (optional)
+     * @param string  $num_payment        {@from body}  Payment number (optional)
+     * @param string  $comment            {@from body}  Note private (optional)
      * @param string  $chqemetteur        {@from body}  Payment issuer (mandatory if paiementcode = 'CHQ')
      * @param string  $chqbank            {@from body}  Issuer bank name (optional)
      * @param string  $ref_ext            {@from body}  External reference (optional)
@@ -1413,12 +1413,12 @@ class Invoices extends DolibarrApi
      * @url     POST /paymentsdistributed
      *
      * @return int  Payment ID
-     * @throws 400
-     * @throws 401
-     * @throws 403
-     * @throws 404
+     * @throws RestException 400
+     * @throws RestException 401
+     * @throws RestException 403
+     * @throws RestException 404
      */
-    public function addPaymentDistributed($arrayofamounts, $datepaye, $paiementid, $closepaidinvoices, $accountid, $num_paiement = '', $comment = '', $chqemetteur = '', $chqbank = '', $ref_ext = '')
+    public function addPaymentDistributed($arrayofamounts, $datepaye, $paymentid, $closepaidinvoices, $accountid, $num_payment = '', $comment = '', $chqemetteur = '', $chqbank = '', $ref_ext = '')
     {
         global $conf;
 
@@ -1441,8 +1441,8 @@ class Invoices extends DolibarrApi
         		throw new RestException(400, 'Account ID is mandatory');
         	}
         }
-        if (empty($paiementid)) {
-        	throw new RestException(400, 'Paiement ID or Paiement Code is mandatory');
+        if (empty($paymentid)) {
+        	throw new RestException(400, 'Payment ID or Payment Code is mandatory');
         }
 
         $this->db->begin();
@@ -1504,38 +1504,38 @@ class Invoices extends DolibarrApi
         }
 
         // Creation of payment line
-        $paiement = new Paiement($this->db);
-        $paiement->datepaye     = $datepaye;
-        $paiement->amounts      = $amounts; // Array with all payments dispatching with invoice id
-        $paiement->multicurrency_amounts = $multicurrency_amounts; // Array with all payments dispatching
-        $paiement->paiementid   = $paiementid;
-        $paiement->paiementcode = dol_getIdFromCode($this->db, $paiementid, 'c_paiement', 'id', 'code', 1);
-        $paiement->num_paiement = $num_paiement;
-        $paiement->note         = $comment;
-        $paiement->ref_ext      = $ref_ext;
-        $paiement_id = $paiement->create(DolibarrApiAccess::$user, ($closepaidinvoices == 'yes' ? 1 : 0)); // This include closing invoices
-        if ($paiement_id < 0)
+        $paymentobj = new Paiement($this->db);
+        $paymentobj->datepaye     = $datepaye;
+        $paymentobj->amounts      = $amounts; // Array with all payments dispatching with invoice id
+        $paymentobj->multicurrency_amounts = $multicurrency_amounts; // Array with all payments dispatching
+        $paymentobj->paiementid   = $paymentid;
+        $paymentobj->paiementcode = dol_getIdFromCode($this->db, $paymentid, 'c_paiement', 'id', 'code', 1);
+        $paymentobj->num_paiement = $num_payment;
+        $paymentobj->note         = $comment;
+        $paymentobj->ref_ext      = $ref_ext;
+        $payment_id = $paymentobj->create(DolibarrApiAccess::$user, ($closepaidinvoices == 'yes' ? 1 : 0)); // This include closing invoices
+        if ($payment_id < 0)
         {
             $this->db->rollback();
-            throw new RestException(400, 'Payment error : '.$paiement->error);
+            throw new RestException(400, 'Payment error : '.$paymentobj->error);
         }
         if (!empty($conf->banque->enabled)) {
             $label = '(CustomerInvoicePayment)';
-            if ($paiement->paiementcode == 'CHQ' && empty($chqemetteur)) {
-                  throw new RestException(400, 'Emetteur is mandatory when payment code is '.$paiement->paiementcode);
+            if ($paymentobj->paiementcode == 'CHQ' && empty($chqemetteur)) {
+                  throw new RestException(400, 'Emetteur is mandatory when payment code is '.$paymentobj->paiementcode);
             }
             if ($this->invoice->type == Facture::TYPE_CREDIT_NOTE) $label = '(CustomerInvoicePaymentBack)'; // Refund of a credit note
-            $result = $paiement->addPaymentToBank(DolibarrApiAccess::$user, 'payment', $label, $accountid, $chqemetteur, $chqbank);
+            $result = $paymentobj->addPaymentToBank(DolibarrApiAccess::$user, 'payment', $label, $accountid, $chqemetteur, $chqbank);
             if ($result < 0)
             {
                 $this->db->rollback();
-                throw new RestException(400, 'Add payment to bank error : '.$paiement->error);
+                throw new RestException(400, 'Add payment to bank error : '.$paymentobj->error);
             }
         }
 
         $this->db->commit();
 
-        return $paiement_id;
+        return $payment_id;
     }
 
     /**