public function RegistrationGuestIsAllowed($oLastBoughtUser)
    {
        $bRegistrationGuestIsAllowed = false;
        if (!is_null($oLastBoughtUser) && !$this->IsLoggedIn() && !$oLastBoughtUser->LoginExists()) {
            $bRegistrationGuestIsAllowed = true;
        }

        return $bRegistrationGuestIsAllowed;
    }