What should an AP team check first on a supplier statement?

Confirm the statement has arrived for the period, then check that its opening balance matches last period's closing balance. If the opening balance doesn't match, everything after it is unreliable until that's explained.

What are the two costliest errors a reconciliation checklist should catch?

Duplicate payments (the same invoice paid twice) and unclaimed credits (credit notes raised but never deducted). Both sit quietly on the books until someone goes looking for them.

How do you tell a timing difference from a genuine discrepancy?

Give unmatched items a defined clearing window first. A payment in transit or an invoice the supplier hasn't processed yet will often resolve on its own within that window. Anything still unmatched after it is a genuine discrepancy worth escalating.

What does a complete audit trail for a reconciliation need to include?

A named reviewer's sign-off, the date it was reconciled, and a record of what was checked, what didn't match, and how each exception was resolved. That record is what an auditor, or your own team later, will need to see.

Why skip some supplier accounts instead of reconciling all of them?

Most teams don't skip accounts on purpose, they just run out of time and only get through the top 10-20 by spend. That leaves the rest of your supplier spend outside any control at all, which is the gap automation is built to close.

Supplier Statement Reconciliation Checklist for AP Teams

1. Before you start

☐ The statement has arrived for this period. If it hasn't, flag the account rather than skipping it. A missing statement means you have no way to check what you owe.
☐ The statement format is converted into something you can compare. PDF, CSV, email table or portal export, whatever it arrives as, get it into a consistent structure before matching starts.
☐ The opening balance matches last period's closing balance. If it doesn't, stop here. Every line after this point is unreliable until the opening balance is explained.

2. Line-by-line matching

☐ Every invoice on the statement is matched to one in your ledger.
☐ Every payment on the statement is matched to one you've recorded.
☐ Credit notes are matched to the invoice or payment they relate to.
☐ Anything in your ledger but missing from the statement is flagged. This usually means the supplier hasn't processed it yet, not that you've made an error.

3. Catching the two costliest errors

☐ Checked for duplicate payments: the same invoice paid twice. Look for a resubmitted invoice number, a repeat from a different contact, or a credit memo applied to the wrong reference.
☐ Checked for unclaimed credits: credit notes raised but never deducted. These sit as open items on both ledgers until someone goes looking for them.

4. Timing differences

☐ Confirmed an unmatched item isn't simply a timing difference. A payment in transit or an invoice not yet processed by the supplier will often resolve on its own.
☐ A reasonable clearing window is applied before escalating. Give timing items a defined window before treating them as genuine discrepancies.

5. Exceptions

☐ Every discrepancy is logged with a reason and an owner.
☐ The supplier is contacted for anything that needs their confirmation.
☐ Exceptions are tracked through to resolution, not just noted and left.

6. Sign-off and audit trail

☐ The reconciliation is signed off by a named reviewer.
☐ The date of reconciliation is recorded.
☐ A full record is kept: what was checked, what didn't match, how it was resolved. This is the evidence an auditor, or a future version of your team, will need.

7. Before you close the period

☐ No supplier account was skipped because of time pressure. If your team can only realistically reconcile the top 10-20 accounts, the rest of your spend sits outside any control at all.
☐ The closing balance for this period is double-checked against your ledger total.
☐ This period's closing balance is carried forward as next period's opening balance.

Ticking every box by hand, every period, for every supplier, is exactly the kind of work Open ECX automates: matching, flagging and the audit trail, done for you, with exceptions routed straight to your team. Talk to us or read the full guide to supplier statement reconciliation.

The Supplier Statement Reconciliation Checklist for AP Teams