Split payments happen when our system calculates the available balance to be sent to a merchant, but the total funds cannot be directly aggregated with the payments that are available.
This results in us sending part of a payment in one transfer, and waiting for the next transfer to send the remaining portion of the payment.
This is most likely to occur when a customer has issued a refund or had a chargeback, but we have already sent out the payment, so the balance does not precisely add up to the previous batch of payments.