def cert_from_instance(instance):
    """ Find certificates that are part of an instance

    :param instance: An instance
    :return: possible empty list of certificates
    """
    if instance.signature:
        if instance.signature.key_info:
            return cert_from_key_info(instance.signature.key_info,
                                      ignore_age=True)
    return []
Find certificates that are part of an instance

    :param instance: An instance
    :return: possible empty list of certificates