Bank details change after the batch is made. The batch keeps the old details. If a seller changes their account, mark the batch failed and create a new one, or pay that seller separately.
Returns and refunds after a batch. A refund after you paid a seller does not undo the payout. Recover it from their next payout or through Vendor Debts.
Seller with no bank details. They still appear in the batch, with empty payment info. Ask them to complete their profile before you pay.
Overlapping periods. Commissions already in another batch are not included again.
Completed batches cannot be reopened. Check everything before clicking Mark Completed.