General ledger: how to trace a supplier payment without losing the audit trail
Trace a supplier payment from bank confirmation to bill, approval, invoice, and ledger entry so a reviewer can prove what happened and where it was recorded.
Bottom line
A useful general ledger lets a reviewer move from a payment to the payable, invoice, approval, and source document without guessing. Equal debits and credits are not enough. The record also needs the right entity, period, account, amount, and a visible correction trail.
Is it right for you?
- Start with the bank payment or provider confirmation
- Match the payment to the open bill and supplier
- Open the invoice, approval, coding, and posting record
- Confirm entity, account, period, amount, and correction history
Trace backward from cash
Pick one payment on the bank statement. The ledger entry should identify the cash account and the liability cleared. The AP subledger should identify the bill, and the bill should point to the invoice, vendor, coding, and approval.
The IRS says business records support financial statements and tax reporting [IRS, 2026]. The same links also let a manager decide whether a payment was authorized and posted in the intended period.
Keep the transaction chain intact
| Record | Question it answers |
|---|---|
| Invoice | What did the supplier charge and when? |
| Approval | Who accepted the business purpose, amount, and coding? |
| Bill or payable | When and where was the obligation recorded? |
| Payment | How, when, and from which account was it settled? |
| Ledger entry | Which accounts, entity, and period changed? |
| Correction | What changed, why, and who approved it? |
Reconcile the subledger before investigating details
Compare the total AP aging with the general-ledger accounts-payable balance. Differences can come from direct journal entries, cutoff timing, failed exports, duplicate vendors, foreign-currency treatment, or a payment applied to the wrong bill.
Name each reconciling item, its amount, owner, and expected clearing date. An unexplained difference carried month after month is not a reconciliation.
Frequently asked questions
Is the general ledger the same as AP aging? No. The ledger contains the accounting balance; AP aging gives supplier and bill detail that should reconcile to it.
Can a balanced entry be misclassified? Yes. The wrong account, entity, period, or vendor can still produce equal debits and credits.
Should corrections overwrite the original entry? No. Preserve the original record and create a dated, approved correction or reversal.
What is the fastest audit-trail test? Start with a bank payment and see whether a reviewer can reach the invoice and approval without using a separate spreadsheet.