For financial integration, the Payments API is currently not exposing the additional fee charges that are added days after the original payment. The API currently only contains the charges and fees taken on the day (except fees for payments using Alternative Payment methods, which is a separate issue known by Mews).
The Payout Report in Mews shows that in addition to these original payments and fees, a number of Commission Adjustments, that are recalculated fees from payments, 2 or more days previously, are added to the day's payout total. None of these Commission Adjustments are included in the API.
As a result, the daily payouts, using the API, do not match what is actually paid into the bank, every day.
It is essential for the Commission Adjustments to be included in the API to reduce manual intervention in external accounting systems to make bank reconciliations reconcile.