01Define the statement boundary
Record supplier legal entity, buyer entity, supplier account, currency, statement number, statement date and covered period. A UN statement-of-account message is designed around one account and one currency; if the supplier combines entities or currencies, split the work before matching. Preserve the received statement rather than editing it into the buyer view.
02Build the buyer ledger extract
Export open and recently cleared invoices, credits, debit notes, deposits, refunds and payments through the same cutoff. Include document number, date, due date, currency, original amount, applied amount and status. Add prior unresolved items. A current open-items report alone may omit a payment or credit that cleared between the two systems at different times.
03Match documents before amounts
Match exact invoice or credit identity, seller, currency and date before comparing value. Then compare original, paid, credited and outstanding amounts. Investigate reused invoice numbers, alternate prefixes, consolidated invoices and credit notes referenced to several documents. Amount-only matching can incorrectly close two equal invoices or hide a duplicate.
04Reconcile payments and remittance
For each buyer payment, record payment reference, value date, currency, bank amount and remittance allocation. Compare it with supplier receipt and application. Keep sent, received, rejected, returned and applied status distinct. UN/CEFACT remittance guidance separates operational matching to invoices and credits from financial matching to the amount actually received.
05Rebuild opening and closing balances
Start with the previously agreed closing balance and add period invoices and debit adjustments, then subtract credits, payments and refunds according to the ledger convention. Recalculate the closing balance independently. If the statement carries only outstanding debts, do not assume cleared items will appear; use the prior packet and buyer ledger to explain the movement.
06Classify every exception
Use reason codes such as buyer-missing invoice, supplier-missing payment, unapplied cash, missing credit, duplicate, amount, currency, date, dispute, timing or unknown opening balance. Assign owner, evidence and target date. A disputed invoice stays visible with its disputed amount and status; deleting it from one view does not resolve the account.
07Agree and carry forward
Send the supplier a concise schedule showing matched, corrected and still-open items. Obtain invoices, credits, allocation details or a revised statement where needed. Post only authorized accounting entries. Record agreed closing balance, buyer and supplier contacts, reconciliation date and next review. Carry forward the exception ID, not a fresh unexplained amount.