diff --git a/htdocs/public/payment/paymentok.php b/htdocs/public/payment/paymentok.php
index 8b040692dc8..27b00fec402 100644
--- a/htdocs/public/payment/paymentok.php
+++ b/htdocs/public/payment/paymentok.php
@@ -888,6 +888,49 @@ if ($ispaymentok) {
 						setEventMessages(null, $attendeetovalidate->errors, "errors");
 					} else {
 						$attendeetovalidate->setStatut(1);
+
+						// Sending mail
+						require_once DOL_DOCUMENT_ROOT.'/core/class/CMailFile.class.php';
+						include_once DOL_DOCUMENT_ROOT.'/core/class/html.formmail.class.php';
+						$formmail = new FormMail($db);
+						// Set output language
+						$outputlangs = new Translate('', $conf);
+						$outputlangs->setDefaultLang(empty($thirdparty->default_lang) ? $mysoc->default_lang : $thirdparty->default_lang);
+						// Load traductions files required by page
+						$outputlangs->loadLangs(array("main", "members"));
+						// Get email content from template
+						$arraydefaultmessage = null;
+
+						$labeltouse = $conf->global->EVENTORGANIZATION_TEMPLATE_EMAIL_AFT_SUBS_EVENT;
+						if (!empty($labeltouse)) {
+							$arraydefaultmessage = $formmail->getEMailTemplate($db, 'eventorganization_send', $user, $outputlangs, $labeltouse, 1, '');
+						}
+
+						if (!empty($labeltouse) && is_object($arraydefaultmessage) && $arraydefaultmessage->id > 0) {
+							$subject = $arraydefaultmessage->topic;
+							$msg     = $arraydefaultmessage->content;
+						}
+
+						$substitutionarray = getCommonSubstitutionArray($outputlangs, 0, null, $thirdparty);
+						complete_substitutions_array($substitutionarray, $outputlangs, $object);
+
+						$subjecttosend = make_substitutions($subject, $substitutionarray, $outputlangs);
+						$texttosend = make_substitutions($msg, $substitutionarray, $outputlangs);
+
+						$sendto = $thirdparty->email;
+						$from = $conf->global->MAILING_EMAIL_FROM;
+						$urlback = $_SERVER["REQUEST_URI"];
+
+						$ishtml = dol_textishtml($texttosend); // May contain urls
+
+						$mailfile = new CMailFile($subjecttosend, $sendto, $from, $texttosend, array(), array(), array(), '', '', 0, $ishtml);
+
+						$result = $mailfile->sendfile();
+						if ($result) {
+							dol_syslog("EMail sent to ".$sendto, LOG_DEBUG, 0, '_payment');
+						} else {
+							dol_syslog("Failed to send EMail to ".$sendto, LOG_ERR, 0, '_payment');
+						}
 					}
 				} else {
 					$db->rollback();