diff --git a/lib/Lufi/Controller/Invitation.pm b/lib/Lufi/Controller/Invitation.pm
index 3350894..0ef84a8 100644
--- a/lib/Lufi/Controller/Invitation.pm
+++ b/lib/Lufi/Controller/Invitation.pm
@@ -228,8 +228,12 @@ sub send_mail_to_ldap_user {
         my @files = ();
         if ($c->config('invitations')->{'save_files_url_in_db'} && $urls->size) {
             my $guest_files = $invitation->files;
+            my %list_token;
             if ($guest_files) {
                 $guest_files = decode_json($guest_files);
+                for my $file (@{$guest_files}) {
+                    $list_token{$file->{token}} = 1;
+                }
             } else {
                 $guest_files = [];
             }
@@ -237,8 +241,10 @@ sub send_mail_to_ldap_user {
             $urls->each(sub {
                 my ($e, $num) = @_;
                 $e = decode_json($e);
-                push @{$guest_files}, $e;
-                push @files, $e;
+                if (!defined($list_token{$e->{token}})) {
+                    push @{$guest_files}, $e;
+                    push @files, $e;
+                }
             });
             $invitation->files(encode_json($guest_files));
             $invitation->write;
diff --git a/themes/default/lib/Lufi/I18N/lufi.pot b/themes/default/lib/Lufi/I18N/lufi.pot
index 4f27a2e..d4c2c95 100644
--- a/themes/default/lib/Lufi/I18N/lufi.pot
+++ b/themes/default/lib/Lufi/I18N/lufi.pot
@@ -512,7 +512,7 @@ msgstr ""
 msgid "Signin"
 msgstr ""
 
-#: lib/Lufi/Controller/Invitation.pm:277 themes/default/templates/invitations/exception.html.ep:16
+#: lib/Lufi/Controller/Invitation.pm:283 themes/default/templates/invitations/exception.html.ep:16
 msgid "Sorry, the invitation doesn’t exist. Are you sure you are on the right URL?"
 msgstr ""
 
@@ -534,7 +534,7 @@ msgid "Sorry, your invitation has expired or has been deleted. Please contact %1
 msgstr ""
 
 #. ($invitation->ldap_user_mail)
-#: lib/Lufi/Controller/Invitation.pm:270
+#: lib/Lufi/Controller/Invitation.pm:276
 msgid "The URLs of your files have been sent by email to %1."
 msgstr ""