How does an approver send a payment run back?

The approver opens the run waiting at the top of Build run and rejects it with a reason — Bank details need checking, A bill is disputed or on hold, Wrong amount on a bill, Not due yet — pay later, Cash — not enough in the bank, Duplicate payment, or Other — plus an optional note. A reason is required. Only a run waiting for approval, or approved and not yet in a bank file, can be sent back. It returns to draft.