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The New Change of Occupier (CoO) Process for Energy Contracts
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Kate McCann
The New Change of Occupier (CoO) Process for Energy Contracts
The Change of Occupier (CoO) process is a vital part of energy contract management — and it’s just been overhauled....
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Read MoreWhat Is a Change of Occupier (CoO)?
Why Has the CoO Process Been Updated?

Key Features of the New Process
Covers All Change Scenarios
Applies to both planned and unplanned changes, whether or not a supplier switch is involved.
Encourages Timely Notification
Energy suppliers should be informed of the change as early as possible to avoid billing issues or delays.
Flexible Document Submission
Either the incoming or outgoing occupier — or both — can provide the required evidence electronically.
Clear Evidence Requirements
Acceptable documents include signed leases, termination notices, TR1 forms, solicitor letters, or business rates bills.
Allows Case-by-Case Decisions
Suppliers can request alternative documents with justification, recognising that not all occupier scenarios are the same.
What Happens If There’s No Supplier Switch?
What If There Is a Supplier Switch?
What’s Not Covered?
Supporting Documents: What Can Be Accepted?
What’s the Outcome of the Change?
Overall, the revised CoO process represents a significant step forward in fairness, clarity, and operational consistency across the energy sector. It gives businesses a more structured path to manage occupancy changes, reduces ambiguity for suppliers, and helps prevent disputes before they start. With clearly defined timelines, improved guidance on acceptable evidence, and a focus on fair treatment, this change supports a smoother transition for all involved — ultimately benefiting both consumers and suppliers alike.
If you’d like any guidance ont the new change, feel free to contact one of our expert team, or book a free consultation.