Final answer:
HR Professionals often receive notifications of Parachute Duty Pay submissions via system notifications, email, and in-app messages, with practices varying by organization.
Step-by-step explanation:
The HR Professional will typically receive notification that a request for Parachute Duty Pay has been submitted for approval through multiple channels. The most common methods include notifications, which may appear within the HR system or platform being used, through email, which is a standard communication tool for formal notifications, and in-app messages, if the HR system has an application with messaging capabilities.
In many organizations, SMS is less commonly used for such formal notifications due to its informality and potential security issues.
However, practices may vary depending on the organization's policy and the HR system in question. The final answer might include more than one communication channel, and the HR professional should check the system settings to verify which methods are enabled for receiving such alerts.