Keep one closeout register per job, visible to the whole team

Snags, documents and certificates all decay in separate people's heads unless they live in one place. Keep a single register that lists every closeout item, who owes it, what condition it is in and what payment it unlocks, reviewed alongside the live work each month. It turns the end of the job into a short list of named tasks with owners, the only form in which the last ten per cent gets done.