The phrase "appropriate parties" refers to the people or individuals who are suitable or relevant to be involved or included in a certain situation or activity. Full definition
The certificate of completion can then be provided to appropriate parties in order to obtain a car insurance discount, or have a traffic ticket dismissed. (dmv.com)
Fellows are responsible for submitting information and for following up with appropriate parties to ensure that a security clearance is obtained. (aaas.org)
• Check customer service emails daily, direct to appropriate party for response. (ziprecruiter.com)