At Airworthiness Certification Services we only collect emails from clients and others who have contacted us or signed up to receive information from us. We never sell or share this data with anyone. We only use it to keep our subscribers updated on the latest industry happenings or to provide special offers on resources we provide that may assist folks involved in DO-254, DO-178C or related programs. We rarely send more than one email per month, and usually only about one per quarter, and subscribers can easily Unsubscribe at any time.