- A deadlock letter is written confirmation that the provider considers your complaint at its final position.
- It lets you refer the complaint to the ombudsman without waiting the full six weeks.
- You can also reach the ombudsman once six weeks have passed since you first complained, even without a deadlock letter.
- If the provider will not issue a deadlock letter, the six-week route still gives you access to the ombudsman.
The deadlock letter is one of the most useful tools in a broadband complaint, and one of the least understood. It is the key that opens the door to independent dispute resolution early, when a provider has dug in and waiting weeks would serve no purpose. Knowing when and how to ask for one can shorten a dispute considerably.
What a deadlock letter is
A deadlock letter is written confirmation from your provider that it regards your complaint as having reached its final position, that the two of you cannot agree and the provider has nothing further to offer. It is not an admission of fault; it is a statement that the internal complaints process is exhausted. That confirmation is what an ombudsman scheme needs to take on the case early.
When you can request one
You can ask for a deadlock letter once it is clear the complaint has stalled, the provider has given its final answer and you remain dissatisfied. There is no need to keep going round in circles. Requesting it in writing, referencing your complaint, signals that you intend to escalate and asks the provider to confirm its final position formally.
What it unlocks
The deadlock letter lets you refer your complaint to the relevant ombudsman, or alternative dispute resolution scheme, without waiting the full six weeks that would otherwise apply. The ombudsman is free for consumers to use and can order remedies the provider must honour. The deadlock letter simply gets you there sooner.
Deadlock letter triggers and next steps
| Situation | What to do |
|---|---|
| Provider gives final answer, you disagree | Request a deadlock letter in writing |
| Deadlock letter received | Refer to the ombudsman straight away |
| Provider refuses a deadlock letter | Wait until six weeks have passed, then escalate |
If the provider refuses
Some providers are reluctant to issue a deadlock letter. That does not block you: the alternative route to the ombudsman opens automatically once six weeks have passed since you first raised the complaint, with or without a deadlock letter. So a refusal only costs you time, not access. Either way, keep your documented complaint record, as the ombudsman will rely on it.
Frequently asked questions
What is a broadband deadlock letter?
It is written confirmation from your provider that your complaint has reached its final position, meaning the internal complaints process is exhausted and you remain dissatisfied. It is not an admission of fault, but it lets you take the dispute to the ombudsman early.
When can I ask for a deadlock letter?
Once it is clear the complaint has stalled, the provider has given its final answer and you still disagree. Request it in writing, referencing your complaint, rather than continuing to go round in circles with the provider's complaints team.
What do I do with a deadlock letter?
Use it to refer your complaint to the relevant ombudsman or alternative dispute resolution scheme without waiting the full six weeks. The ombudsman is free for consumers and can order remedies the provider must honour.
Can I go to CISAS without a deadlock letter?
Yes, once six weeks have passed since you first raised the complaint, you can refer it to the ombudsman scheme even without a deadlock letter. The deadlock letter simply lets you escalate sooner if the provider issues one.
What if my ISP will not send a deadlock letter?
A refusal does not block you. The route to the ombudsman opens automatically once six weeks have passed since you first complained, with or without a deadlock letter, so a refusal only costs you time, not access to escalation.
