diff --git a/htdocs/core/class/html.formmail.class.php b/htdocs/core/class/html.formmail.class.php
index 72b4050f9b3..fd0a7c7a63f 100644
--- a/htdocs/core/class/html.formmail.class.php
+++ b/htdocs/core/class/html.formmail.class.php
@@ -1254,9 +1254,9 @@ class FormMail extends Form
 	 *  @param	string		$type_template	Get message for model/type=$type_template, type='all' also included.
 	 *  @param	User		$user			Get template public or limited to this user
 	 *  @param	Translate	$outputlangs	Output lang object
-	 *  @param	int			$id				Id of template to find, or -1 for first found with position 0, or 0 for first found whatever is position (priority order depends on lang provided or not) or -2 for exact match with label (no answer if not found)
+	 *  @param	int			$id				Id of template to get, or -1 for first found with position 0, or 0 for first found whatever is position (priority order depends on lang provided or not) or -2 for exact match with label (no answer if not found)
 	 *  @param  int         $active         1=Only active template, 0=Only disabled, -1=All
-	 *  @param	string		$label			Label of template
+	 *  @param	string		$label			Label of template to get
 	 *  @return ModelMail|integer			One instance of ModelMail or -1 if error
 	 */
 	public function getEMailTemplate($db, $type_template, $user, $outputlangs, $id = 0, $active = 1, $label = '')
diff --git a/htdocs/public/payment/paymentok.php b/htdocs/public/payment/paymentok.php
index 5bf78e9e17a..ecc19b75ab5 100644
--- a/htdocs/public/payment/paymentok.php
+++ b/htdocs/public/payment/paymentok.php
@@ -1264,17 +1264,21 @@ if ($ispaymentok) {
 							// Get email content from template
 							$arraydefaultmessage = null;
 
-							$labeltouse = $conf->global->EVENTORGANIZATION_TEMPLATE_EMAIL_AFT_SUBS_EVENT;
+							$idoftemplatetouse = $conf->global->EVENTORGANIZATION_TEMPLATE_EMAIL_AFT_SUBS_EVENT;	// Email to send for Event organization registration
 
-							if (!empty($labeltouse)) {
-								$arraydefaultmessage = $formmail->getEMailTemplate($db, 'conferenceorbooth', $user, $outputlangs, $labeltouse, 1, '');
+							if (!empty($idoftemplatetouse)) {
+								$arraydefaultmessage = $formmail->getEMailTemplate($db, 'conferenceorbooth', $user, $outputlangs, $idoftemplatetouse, 1, '');
 							}
 
-							if (!empty($labeltouse) && is_object($arraydefaultmessage) && $arraydefaultmessage->id > 0) {
+							if (!empty($idoftemplatetouse) && is_object($arraydefaultmessage) && $arraydefaultmessage->id > 0) {
 								$subject = $arraydefaultmessage->topic;
 								$msg     = $arraydefaultmessage->content;
+							} else {
+								$subject = '['.$object->ref.' - '.$outputlangs->trans("NewRegistration").']';
+								$msg = $outputlangs->trans("OrganizationEventPaymentOfRegistrationWasReceived");
 							}
 
+
 							$substitutionarray = getCommonSubstitutionArray($outputlangs, 0, null, $thirdparty);
 							complete_substitutions_array($substitutionarray, $outputlangs, $object);
 
@@ -1293,7 +1297,7 @@ if ($ispaymentok) {
 							if ($result) {
 								dol_syslog("EMail sent to ".$sendto, LOG_DEBUG, 0, '_payment');
 							} else {
-								dol_syslog("Failed to send EMail to ".$sendto, LOG_ERR, 0, '_payment');
+								dol_syslog("Failed to send EMail to ".$sendto.' - '.$mailfile->error, LOG_ERR, 0, '_payment');
 							}
 						}
 					}
@@ -1449,14 +1453,18 @@ if ($ispaymentok) {
 										// Get email content from template
 										$arraydefaultmessage = null;
 
-										$labeltouse = $conf->global->EVENTORGANIZATION_TEMPLATE_EMAIL_AFT_SUBS_EVENT;
-										if (!empty($labeltouse)) {
-											$arraydefaultmessage = $formmail->getEMailTemplate($db, 'conferenceorbooth', $user, $outputlangs, $labeltouse, 1, '');
+										$idoftemplatetouse = $conf->global->EVENTORGANIZATION_TEMPLATE_EMAIL_AFT_SUBS_BOOTH;	// Email sent after registration for a Booth
+
+										if (!empty($idoftemplatetouse)) {
+											$arraydefaultmessage = $formmail->getEMailTemplate($db, 'conferenceorbooth', $user, $outputlangs, $idoftemplatetouse, 1, '');
 										}
 
-										if (!empty($labeltouse) && is_object($arraydefaultmessage) && $arraydefaultmessage->id > 0) {
+										if (!empty($idoftemplatetouse) && is_object($arraydefaultmessage) && $arraydefaultmessage->id > 0) {
 											$subject = $arraydefaultmessage->topic;
 											$msg     = $arraydefaultmessage->content;
+										} else {
+											$subject = '['.$booth->ref.' - '.$outputlangs->trans("NewRegistration").']';
+											$msg = $outputlangs->trans("OrganizationEventPaymentOfBoothWasReceived");
 										}
 
 										$substitutionarray = getCommonSubstitutionArray($outputlangs, 0, null, $thirdparty);