What to include
- Portfolio name and ID.
- Ad account IDs.
- Admin names.
- Payment method owners.
- Where backup codes are kept.
Where to keep it
In a secure place, not in a chat.
Update
Review it each quarter.
Official sources
Meta changes its help pages, menus and forms often. Follow the wording on your own screen and the current Help Center. Restore Ad Account is an independent service and is not affiliated with Meta.