Evidence is information that helps prove or disprove a fact; the strongest evidence is relevant, reliable and linked to the issue that actually needs deciding.
Consumer disputes often become difficult because facts, assumptions and argument are mixed together. Evidence is the material that supports the factual points: contracts, bills, emails, call recordings, screenshots, account notes, credit reports, policies and other records.
The aim is not to collect the most paper. It is to identify the smallest set of reliable records that answer the disputed questions.
Key points
- Relevance, does the item bear on the disputed issue?
- Reliability, when, how and by whom was it created?
- Records made at the time are often valuable because they pre-date the dispute.
- A statement in a complaint letter is an assertion unless supported by evidence.
- Preserve originals where authenticity, metadata or version may matter.
Evidence, inference and argument
| Evidence | The actual record: email, bill, recording, screenshot, policy, log. |
|---|---|
| Inference | A conclusion reasonably drawn from evidence, but not itself a proven fact. |
| Argument | Why the evidence and applicable framework should lead to a particular outcome. |
Weight, not just existence
Two documents can conflict. A decision-maker then considers weight: contemporaneity, internal consistency, independence, detail, provenance and fit with other records. Do not assume “internal system note” automatically beats a customer email or vice versa.
Build an evidence index
Give each document a short identifier, date, title and relevance note. This helps an ombudsman or complaint handler see why it matters without searching a large bundle.
In practice
- For each complaint issue, write the fact you need to prove and identify the best record for it.
- Separate documents proving the underlying event from documents proving impact/remedy.
- Keep contradictory records together rather than hiding inconvenient evidence.
What to do
A practical next-step plan
- List disputed facts.
- Match each fact to primary evidence.
- Check dates and provenance.
- Remove irrelevant duplicates.
- Create an evidence index.
- Explain conflicts neutrally.
Common traps
Things that often confuse the issue
- Document dumping.
- Treating repeated assertions as corroboration.
- Cropping screenshots so date/context disappears.
- Using current website terms to prove what was shown years earlier.