Notion, Confluence and wiki history

Strength: Good

What it proves

Page-level edit history with timestamps and author attribution, showing a document assembled over time.

What it does not

Some plans cap how far back history goes, so it may not reach far enough for older work.

How to get it

Open the page menu and look for Page history or Version history. Check the plan's retention limit before relying on it.

How long it survives

Depends entirely on the plan. Export anything important before you need it.

Why it matters

Worth checking early, because the limit is a trap for exactly the long-running documents most likely to be questioned.