When the preview looks right, run the same entry as a dry run against Sage — full validation, nothing posted. Then post for real, from the same screen.
Posting is built for the day the connection drops. Every post is written to a durable log before it goes out, so an interruption mid-post recovers cleanly — no duplicates, no half-posted entries, no wondering what made it across. And every step is recorded: who ran it, when, and what Sage said back.
That trail is what you hand the finance committee. Not a screenshot — the record.