How does payables deals with applying refunds either on Invoice/prepayment invoice? 2, What is the difference between Payment disbursement, document types & Payment method/types? How they relates to each other? 3, Types of Invoice validation, types of Invoice hold and why? How to release/resolve different types of holds? Invoice HOLD, Matching process & Payment Hold? 4, What is Interest Invoice and how it can be created? 5, You've come to close an AP accounting period and the period won't close. What could be wrong? 6, Can you cancel an invoice? If yes, explain? 7, How to Void Payment and the impact on invoice? Thanks for everyone that takes part.