A company using Dynamics 365 Finance notices that the trial balance does not balance because the 'Accounts Payable' account has a negative balance. What could be the reason?
Why D is correct
Why this answer
A negative balance in the Accounts Payable account typically indicates that credits (payments) exceed debits (invoices) for a vendor. Posting a vendor payment to the wrong vendor account creates a credit balance in the intended vendor's subledger without a corresponding invoice, causing the trial balance to be out of balance because the general ledger account reflects the payment but the subledger detail is misaligned.
Exam trap
The trap here is that candidates often assume a negative AP balance is caused by a data entry error like a prepayment or intercompany issue, but the specific symptom of a trial balance not balancing points to a subledger-to-general ledger mismatch, which is exactly what posting a payment to the wrong vendor creates.
How to eliminate wrong answers
Option A is wrong because posting a prepayment invoice without a purchase order creates a prepayment balance, not a negative Accounts Payable balance; it is a valid accounting entry that increases a prepaid asset. Option C is wrong because incorrect intercompany transactions cause imbalances between related company accounts, not a negative balance in a single Accounts Payable account. Option D is wrong because a bank reconciliation not being performed affects the bank and cash accounts, not the Accounts Payable account directly.