A handover should be usable
A folder of source files is only one part of ownership. The people taking over also need to know where the platform lives, how routine changes are made, and where to look when something needs attention.
Documentation should follow actual tasks rather than simply describe every available setting.
Keep the accounts clear
Clarify responsibility for the domain, hosting, third-party licenses, integrations, and deployment process before launch. Access should not depend on a single person remembering a password.
The project agreement should make account control and code ownership explicit rather than leaving either to assumption.
Document decisions, not just clicks
An editor benefits from a visual walkthrough. A future developer also needs to know why the content was structured a particular way, where custom behavior lives, and which integrations are important.
Those notes reduce uncertainty when the website needs to evolve. They are a practical part of the build, not decorative paperwork.
Finish with a walkthrough
Let the team try the real editing tasks during handover. Questions at this stage show where the interface or documentation needs to become clearer. A good handover leaves fewer reasons to be afraid of making a change.