How to take over software from a previous developer.

Name a business owner and an incoming technical owner. Record current incidents, release plans and essential dates. Agree how the outgoing and incoming teams will communicate while responsibility overlaps. Ask what must keep running tomorrow, even if improvement work pauses.

Avoid revoking the outgoing team’s access before the replacement access and operating process have been verified. If there is a dispute or unauthorized activity, involve the account provider and appropriate advisers; account control and legal ownership may be different questions.

Log in through company accounts to check the rights. A screenshot or list of usernames is supporting evidence, not proof that the company can operate the service. See the account recovery guide if the access is missing.

Choose representative transactions: create a quote, confirm a booking, fulfill an order, send an invoice or export a required report. Record the expected result, edge cases and who can accept the outcome. Ask the outgoing developer which parts fail, which tasks run on a schedule and which fixes are only temporary.

These examples become acceptance criteria for the takeover. They also help the incoming team distinguish intentional behavior from defects before changing unfamiliar code.

The incoming team should be able to deploy in a separate environment using documented instructions. Record the dependencies, configuration and credentials needed. Then restore an agreed backup and verify that the restored system and its data work together.

A successful backup job does not establish recoverability. The restoration record should say what was restored, when, by whom, what was tested, how long it took and what remained missing. Keep the production business running while the test occurs.

Choose the first change based on the business consequence. It might remove a fragile integration, repair a failing job or move a service into the company’s account. Define the test, acceptance owner and rollback before release.

Use the first change to verify the whole operating process: access, deployment, observation, acceptance, recovery and the record update. A large rewrite introduces more uncertainty before the incoming team has learned the system. Use the rescue versus rebuild criteria when replacement is proposed.

1. Current system map and account inventory, with verified rights.
2. Deployment instructions, runbooks and restoration test results.
3. Known incidents, unresolved defects, vendor dependencies and renewal dates.
4. Acceptance criteria, outstanding decisions and a prioritized roadmap.
5. Named primary and secondary contacts, response window and escalation path.
6. Confirmed access removal or rotation once continuity is established.

A handover can complete with known gaps if the owner accepts them and someone is responsible for closing them. Do not describe the system as fully under control while important access or recovery remains untested.

If the business has nobody qualified to verify the handover, Foundation provides the review and first delivery. Read the takeover service. The vehicle lead and dispatch case shows how an inherited workflow was diagnosed, stabilized and extended.