When cloud or tooling costs move away from budget, the finance lead and the engineering manager get a bridge from budget to actual by service and cost owner, with usage beside each large move, the unallocated and shared costs, and the questions each side must answer.
When a sponsored run ends, the partnerships lead gets a register of each placement in the signed scope beside the publication record, metrics and invoices. Gaps, changed dates and incomparable metrics stay visible; billing questions go to finance.