Reconcile a correspondent bank's nostro account activity against internally booked vostro entries using SWIFT MT950 statement messages

Steps

1. Receive the MT950 Statement Message from the account-servicing correspondent for each nostro account, sent from account-servicing institution to account owner
2. Parse the mandatory fields: Transaction Reference Number (field 20), Account Identification (field 25), Statement/Sequence Number (field 28C), and Opening Balance (field 60a)
3. Parse each repeating Statement Line (field 61) — value date, debit/credit mark, amount, transaction type, and references — and match it to the corresponding internally recorded vostro/ledger entry by reference and amount
4. Roll the opening balance forward through all statement lines and confirm the result ties to the stated Closing Balance (field 62a), using the optional Closing Available Balance (field 64) as an additional control check
5. Age and investigate any unmatched statement lines or internal entries as reconciliation breaks rather than editing the statement to force a match
6. Where a payment was announced via MT103/MT202 but only confirmed by its appearance on the MT950 (no separate MT910 credit confirmation was sent), treat the MT950 line as the authoritative confirmation of credit