This is a state requirement for anyone engaging in or advertising to be performing home watch duties. An exception exists for companies and individuals that do not possess keys and perform exterior checks exclusively. Applicants must submit a license bond, three character references, submit to an extensive background check and complete a live interview. Going forward, licensees may be subject to audit and are required to report any new employees that will have access to properties. As a condition of annual renewal, a refreshed background check is conducted. To confirm an active watch license, contact the MA State Police Certification Unit at 978-538-6128.