Individual HTML example · Interface interference

Non-refundable condition appears after fare selection

A fictional rail booking page labels a fare “Flexible Saver” but places the fact that it is non-refundable inside a collapsed section reached only after passenger details.

Hidden or ineffective material informationRail fare comparisonPricing

This is an original fictional comparison. It depicts no real business and is not a regulator finding, statutory category or legal safe harbour.

Rail fare comparisonPricing

Non-refundable condition appears after fare selection

A fictional rail booking page labels a fare “Flexible Saver” but places the fact that it is non-refundable inside a collapsed section reached only after passenger details.

Potentially problematicFlexible Saver · $64

Flexible Saver · $64. The non-refundable condition is absent from the fare card and comparison table.. Displayed amount: $64. Choose $64 fare. Review fare conditions

Neutral alternativeSaver · $64 · non-refundable

Saver · $64 · non-refundable. Price and the material restriction appear together before selection.. Review fare conditions. Choose $64 fare. Price, period and commitment, expanded: The price and material terms associated with “Review fare conditions” remain beside this choice.

Why the first version can mislead: The presentation changes what the user can notice or predict at the pricing decision. The problematic state shows: “The non-refundable condition is absent from the fare card and comparison table.” Its influence should be tested by comparing the consequence and usability of “Choose $64 fare” with “Review fare conditions”. A traveller may select an unsuitable fare because a material restriction is absent from the comparison decision.

What a fairer design does: Place refundability, change conditions and any material restriction beside each fare before selection.

Show annotated differences (4)
Potentially problematic version
  • The non-refundable condition is absent from the fare card and comparison table.Why this state matters: The presentation changes what the user can notice or predict at the pricing decision. The problematic state shows: “The non-refundable condition is absent from the fare card and comparison table.” Its influence should be tested by comparing the consequence and usability of “Choose $64 fare” with “Review fare conditions”. A traveller may select an unsuitable fare because a material restriction is absent from the comparison decision.
  • Review fare conditionsReview prompt: Do “Choose $64 fare” and “Review fare conditions” receive comparable prominence and explain their consequences before activation?
Neutral alternative
  • Price and the material restriction appear together before selection.Fairer design: Place refundability, change conditions and any material restriction beside each fare before selection.
  • Price, period and commitment, expanded: The price and material terms associated with “Review fare conditions” remain beside this choice.Review prompt: Place the compared prices, billing periods and material terms on one evidence sheet; where does it support “The information is plausibly material to a concrete decision”?
Review questions (3)
  • Do “Choose $64 fare” and “Review fare conditions” receive comparable prominence and explain their consequences before activation?
  • Place the compared prices, billing periods and material terms on one evidence sheet; where does it support “The information is plausibly material to a concrete decision”?
  • What neutral rendering or comprehension result would falsify the classification, particularly in light of “Purely optional detail with no plausible decision relevance”?
Side-by-side rail fare comparison interface showing “Flexible Saver · $64” and the clearer alternative “Saver · $64 · non-refundable”.Provenance: Original hypothetical rail fare comparison example created for this library; no real business, product or interface is depicted.

Complete practice context

How this example relates to Hidden or ineffective material information

Information relevant to the decision is absent or presented so ineffectively that it is unlikely to inform the user at the decision point. This is a design and research taxonomy for learning and evidence review, not a statutory offence label or an automatic finding that an interface is unlawful.

The full guide explains inclusion and exclusion criteria, potential harms, fairer design, evidence questions and separate Australian legal information layers. The example page isolates one scenario so it can be shared and discussed without reproducing the complete library on one page.

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Sources and provenance for this example

Evidence base

Sources

  1. Dark commercial patternsOrganisation for Economic Co-operation and Development · Secondary · checked 2026-09-14 · OECD Digital Economy Papers No. 336
  2. Competition and Consumer Amendment (Unfair Trading Practices) Act 2026Federal Register of Legislation · Primary · checked 2026-09-14 · C2026A00064
  3. Competition and Consumer Act 2010, including Schedule 2: Australian Consumer LawFederal Register of Legislation · Primary · checked 2026-09-14 · C2004A00109
  4. Online travel agency eDreams pays penalties and gives undertaking over allegedly misleading subscription pricesAustralian Competition and Consumer Commission · Primary · checked 2026-09-14
  5. JustAnswer to pay $10m in penalties for misleading pricing representations and misleading affiliation claimsAustralian Competition and Consumer Commission · Primary · checked 2026-09-14