Final answer:
Tom should notify the travel card vendor and the Agency Program Coordinator (APC) about his change of address for travel card matters.
Step-by-step explanation:
Tom, a cardholder who was recently transferred from Edwards Air Force Base, California to Offutt Air Force Base, Nebraska, should notify both the travel card vendor and the Agency Program Coordinator (APC) regarding his change of address for travel card matters. The travel card vendor is the company that issued the card, and they need up-to-date information to manage the account properly and ensure that all correspondence reaches the cardholder. The APC is responsible for the oversight of the travel card program at Tom's organization and will help facilitate the process of updating his address in the official system, as well as provide assistance with any other necessary changes to his travel card account as a result of the move.