Test the handover as a task
A folder of documents does not establish that a system can be maintained. Ask someone other than the implementer to follow the setup instructions in a clean environment. Record every undocumented assumption they encounter: a missing variable, an unavailable package, a manual database change or an account that only the original developer controls.
Map the operating dependencies
List the runtime, database, storage, external services and scheduled jobs. For each dependency, identify its purpose, owner and configuration location. Keep secret values outside documentation and source control; the handover should describe how authorized people obtain access, not reproduce credentials. Distinguish configuration needed at build time from values read when the service starts.
Explain how to recognize a healthy system
A successful process start is a weak health check. Define a small set of representative journeys and operational signals: a user can authenticate, a form reaches its configured destination, a job completes and a backup is created. Record expected failures too, so an operator can distinguish an unconfigured feature from a new incident.
Include recovery, not just backup
Document where backups live, who can access them and how a restoration is tested. A backup file that has never been restored leaves an important assumption unresolved. Recovery instructions should describe application configuration, data restoration and verification together. Restoring only the database may not reconstruct uploaded files or external integration state.
Make rollback explicit
State which changes can be reversed by deploying the previous release and which involve data migrations. A destructive schema change may make a code-only rollback unsafe. For such changes, agree the recovery or forward-fix procedure before release. Keep a record of the release artifact and configuration assumptions so the previous version is actually reproducible.
Leave a useful backlog
Separate known defects, unverified checks and optional improvements. Give each item enough context to investigate without repeating the original discovery. A handover does not mean there are no remaining issues; it means the next responsible person can understand the state of the system and make an informed decision about what to do next.