Final answer:
After checking the start date, the Vacation Ownership System (VOS) is likely used to check if the deposit is eligible for PFD as it manages financial transactions related to vacation ownership.
Step-by-step explanation:
The question pertains to a specific procedure related to checking the eligibility of a deposit for a Potential Future Dividend (PFD).
Once the start date has been verified, the system to check for PFD eligibility would most likely be the Vacation Ownership System (VOS).
This specialized system is designed to manage various aspects of timeshare or vacation ownership programs, including financial transactions and ownership details. Systems such as Reservation Requests, Dining Reservations, and Account Balance would not typically have the required information for determining PFD eligibility.