The best way to reduce headcount in accounts payable is to provide an easier way for business buyers (especially departmental and project managers) to capture their purchase requisitions and orders into the system, and to give suppliers self-service capabilities. Vendors should provide their own master data details, certificates, and responses to compliance questionnaires (modern slavery provisions, for example). Vendors should also be able to check their assigned purchase orders and invoice payment statuses to remove a lot of administrative queries from your Accounts Payable team.