A complaint timeline tells you when to chase, when to escalate and which deadline belongs to which scheme.
There is no single universal complaint deadline. Financial firms, telecom providers, public bodies, data-protection complaints and legal-service complaints each have different processes. Keep a separate deadline table for the organisation’s response, ombudsman referral and any legal limitation period.
Do not assume that continuing correspondence automatically extends an external referral deadline.
Key points
- Record the date the formal complaint was received.
- Record the final response date and any referral deadline printed on it.
- Telecom ADR is generally available after six weeks or deadlock; financial complaints commonly use an eight-week firm-response period.
- External complaint deadlines and court limitation periods are separate.
Dates worth tracking
- Initial incident
- Formal complaint received
- Acknowledgement
- Information/evidence requested
- Final response/deadlock
- ADR or ombudsman eligibility date
- External referral deadline
- Any promised remedy date
- Legal limitation date where relevant
Scheme-specific clocks
Use the rules for the actual sector. A telecom complaint reaching six weeks in 2026 should not be held back because an old article says eight weeks. A Legal Ombudsman complaint has different time limits again.
Build in evidence time
If you need a SAR, expert report or credit report, start early. Do not assume an ombudsman referral deadline will wait while you gather optional evidence.
In practice
- Put dates in a calendar with reminders before, not on, the deadline.
- Keep the final response envelope/email timestamp.
- If an organisation asks you to wait beyond an external deadline, ask whether it agrees in writing to any extension - and verify whether the scheme permits that.
What to do
A practical next-step plan
- Identify the sector and complaint scheme.
- Record the formal complaint date.
- Calculate the earliest escalation date.
- Record any final response and referral deadline.
- Set reminders.
- Escalate in time even if supplementary evidence will follow.
Common traps
Things that often confuse the issue
- Do not use a generic “8 weeks” rule for every sector.
- Do not confuse response deadlines with limitation periods.
- Do not rely on a customer-service promise that “the case will stay open”.
Evidence worth keeping
Build a deadline table at the start of escalation.
Useful fields.
Event date | complaint date | acknowledgement date | final/deadlock date | ADR/ombudsman earliest referral date | final referral deadline | court/tribunal limitation date | next action.
Where a rule is sector-specific or has recently changed, link the official source beside the deadline.
Treat promised dates as evidence, not statutory extensions.
If the organisation says “we will reply within 10 working days”, record it. Missing that promise can be relevant to complaint handling, but it does not necessarily alter a statutory or scheme deadline unless the governing rules say so.
Do not assume an open complaint pauses a legal deadline.
Complaint handling and legal limitation are different systems. An organisation can keep corresponding while a court or tribunal deadline continues to run. Where a deadline could expire, obtain specialist advice or take the procedural step required to preserve the claim rather than relying on “we are still investigating”.
There are three different clocks: the event clock, the complaint clock and the escalation clock.
The date the problem happened can affect limitation or scheme eligibility. The date you first complained can start an internal or ADR waiting period. A final response can start a separate referral deadline. Treat those clocks separately and record each one.
| Clock | Example |
|---|---|
| Underlying event | Date of charge, dismissal, data disclosure, service failure. |
| Internal complaint | Date the organisation first logged the complaint. |
| Escalation eligibility | For telecom complaints raised from 8 April 2026, ADR can generally open after six weeks if unresolved. |
| Referral deadline | Some ombudsmen require referral within a stated period after final response. |
| Court limitation | Runs under the applicable law and is not automatically paused by a complaint. |