Sneaking · Australia
Negative option or unauthorised transaction
Negative option or unauthorised transaction is a working label for this design mechanism: Silence, inactivity or an ineffective prior interaction is treated as authorisation for a paid or consequential transaction. This is editorial implementation guidance for Australian journeys, not a finding of unlawfulness. From 1 July 2027, a similar interface is relevant to ACL section 28B only if the complete consumer-connection, manipulation or unreasonable-distortion and actual-or-likely-detriment test is met. Current ACL rules require a separate assessment.
- Family
- Sneaking
- Also known as
- Journey stages
Definition
What is this pattern?
Silence, inactivity or an ineffective prior interaction is treated as authorisation for a paid or consequential transaction. 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.
How it works
Silence, inactivity or an ineffective prior interaction is treated as authorisation for a paid or consequential transaction. Silence, a failed refusal or another non-affirmative event is interpreted as permission for a new charge, product or continuing commercial state.
Warning signs
- A charge, supply or commitment occurs or is scheduled.
- No clear current assent to that consequence is evidenced.
- The design relies on non-response, hidden default or ambiguous prior wording.
Potential harms
- Inactivity may produce a charge that the subscriber never actively authorised.
- A person can be charged despite attempting to refuse the transaction through the supplied route.
Learn by comparison
What does this look like?
These fictional examples make the design mechanism easier to recognise. They do not depict a real company and do not establish that an individual interface is unlawful.
Illustrative example 1 · Silence treated as renewal approval
A fictional service states that failing to reply to an email will be treated as approval for a new paid add-on at renewal.
Potential consumer harm: Inactivity may produce a charge that the subscriber never actively authorised.
Illustrative example 2 · Broken opt-out still results in a charge
A fictional trial email provides an opt-out link that returns an error, then charges the customer because the failed request is recorded as no response.
Potential consumer harm: A person can be charged despite attempting to refuse the transaction through the supplied route.
Silence treated as renewal approval
A fictional service states that failing to reply to an email will be treated as approval for a new paid add-on at renewal.
Upgrade at renewal. No reply is treated as acceptance of a $60 add-on.. Selected: No action means yes. Not selected: Keep current plan
Optional renewal upgrade. The add-on remains off unless the subscriber selects it.. Not selected: Keep current plan. Not selected: No action means yes. Choice consequences, expanded: The consequence of selecting “Keep current plan” is displayed beside the option.
Why the first version can mislead: The final commercial state diverges from the choice represented earlier in the journey. The problematic state records: “No reply is treated as acceptance of a $60 add-on.” Review the timing and affirmative selection needed before “No action means yes” changes price, product or recurring liability. Inactivity may produce a charge that the subscriber never actively authorised.
What a fairer design does: Do not treat silence as a new purchase; request a clear choice and preserve the existing contract if none is made.
Show annotated differences (4)
- No reply is treated as acceptance of a $60 add-on.Why this state matters: The final commercial state diverges from the choice represented earlier in the journey. The problematic state records: “No reply is treated as acceptance of a $60 add-on.” Review the timing and affirmative selection needed before “No action means yes” changes price, product or recurring liability. Inactivity may produce a charge that the subscriber never actively authorised.
- Not selected: Keep current planReview prompt: Which affirmative action authorises “No action means yes”, and where is the resulting price, product or recurring state shown before commitment?
- The add-on remains off unless the subscriber selects it.Fairer design: Do not treat silence as a new purchase; request a clear choice and preserve the existing contract if none is made.
- Choice consequences, expanded: The consequence of selecting “Keep current plan” is displayed beside the option.Review prompt: Capture every peer option, its default state and visual prominence; do those states support “A charge, supply or commitment occurs or is scheduled”?
Review questions (3)
- Which affirmative action authorises “No action means yes”, and where is the resulting price, product or recurring state shown before commitment?
- Capture every peer option, its default state and visual prominence; do those states support “A charge, supply or commitment occurs or is scheduled”?
- Which specific affirmative event creates the final commercial state, and could “Clearly disclosed subscription renewal supported by valid assent and applicable notices” explain the observed outcome instead?
Broken opt-out still results in a charge
A fictional trial email provides an opt-out link that returns an error, then charges the customer because the failed request is recorded as no response.
Keep your trial benefits. The opt-out link errors and the system interprets failure as acceptance.. Blocking step: upcoming. Obscured outcome: upcoming
Your opt-out is recorded. The request receives a timestamped receipt and no renewal charge is created.. Completion step: upcoming. Recorded outcome: upcoming. Request recorded: Download opt-out receipt
Why the first version can mislead: The final commercial state diverges from the choice represented earlier in the journey. The problematic state records: “The opt-out link errors and the system interprets failure as acceptance.” Review the timing and affirmative selection needed before “No response recorded” changes price, product or recurring liability. A person can be charged despite attempting to refuse the transaction through the supplied route.
What a fairer design does: Make the refusal route reliable, record attempted requests and suspend charging when the service cannot confirm the choice.
Show annotated differences (4)
- The opt-out link errors and the system interprets failure as acceptance.Why this state matters: The final commercial state diverges from the choice represented earlier in the journey. The problematic state records: “The opt-out link errors and the system interprets failure as acceptance.” Review the timing and affirmative selection needed before “No response recorded” changes price, product or recurring liability. A person can be charged despite attempting to refuse the transaction through the supplied route.
- Obscured outcome: upcomingReview prompt: Which affirmative action authorises “No response recorded”, and where is the resulting price, product or recurring state shown before commitment?
- The request receives a timestamped receipt and no renewal charge is created.Fairer design: Make the refusal route reliable, record attempted requests and suspend charging when the service cannot confirm the choice.
- Request recorded: Download opt-out receiptReview prompt: Count steps, waits, offers and channel changes through final confirmation; where does the route meet “No clear current assent to that consequence is evidenced”?
Review questions (3)
- Which affirmative action authorises “No response recorded”, and where is the resulting price, product or recurring state shown before commitment?
- Count steps, waits, offers and channel changes through final confirmation; where does the route meet “No clear current assent to that consequence is evidenced”?
- Which specific affirmative event creates the final commercial state, and could “transaction explicitly confirmed at the material decision point” explain the observed outcome instead?
What is a fairer alternative?
Obtain clear, specific assent before any paid consequence and do not treat silence or inactivity as a new authorisation.
Legal and information status
How Australian law may apply
Silence, inactivity or an ineffective prior interaction is treated as authorisation for a paid or consequential transaction. Silence, a failed refusal or another non-affirmative event is interpreted as permission for a new charge, product or continuing commercial state. These harms describe a review risk, not an automatic legal conclusion. Australian section 28B commences on 1 July 2027 and requires its complete, context-specific test. Existing ACL provisions remain a separate current-law assessment.
ACL section 28B, inserted by the 2026 Act
Possible risk indicator
In subscription and cancellation journeys, the negative option or unauthorised transaction mechanism may warrant review where it manipulates a consumer or unreasonably distorts the decision environment and causes, or is likely to cause, detriment. The sneaking label and an interface similarity do not establish a contravention; the complete section 28B test, scope, facts and evidence must be applied from 1 July 2027.
Dark-pattern research taxonomy
Editorial analysis
The cited research sources support this working pattern within the sneaking family. It is editorial implementation guidance, not an Australian statutory category, regulator finding or legal safe harbour.
Evidence layers and open questions
Applicable law, enforcement records, policy preparation, stakeholder input, editorial analysis and unknown future details remain visibly distinct.
Final Act mappingEditorial implementation guidance
This editorial practice label is not itself an express statutory prohibition. Apply the complete provision and its scope to the facts.
Possible general-test applicationCommences 1 July 2027
ACL section 28B, inserted by the 2026 Act: In subscription and cancellation journeys, the negative option or unauthorised transaction mechanism may warrant review where it manipulates a consumer or unreasonably distorts the decision environment and causes, or is likely to cause, detriment. The sneaking label and an interface similarity do not establish a contravention; the complete section 28B test, scope, facts and evidence must be applied from 1 July 2027.
Existing ACLCurrent enforcement
Existing ACL provisions continue to apply on their own elements before and after commencement. The 2027 provisions must not be applied early.
Verified enforcement contextCurrent enforcement
No named pattern-specific enforcement example is asserted on this page. Existing ACL analysis remains fact-specific and separate from the 2027 provisions.
RegulationsRegulation pending
Later regulations may affect specified exclusions, matters or exceptions. That uncertainty does not postpone a core enacted rule unless the provision itself depends on prescription.
Regulator implementation materialGuidance pending
Government funding and parliamentary material anticipate regulator education and guidance. No dedicated final ACCC implementation guide is treated here as published.
Journey and evidence recommendationsEditorial implementation guidance
Obtain clear, specific assent before any paid consequence and do not treat silence or inactivity as a new authorisation. This is editorial portal guidance, not a statutory duty, regulator safe harbour or compliance certificate.
Context matters
Context and boundary cases
- A charge, supply or commitment occurs or is scheduled.
- No clear current assent to that consequence is evidenced.
- The design relies on non-response, hidden default or ambiguous prior wording.
- Boundary to test: Clearly disclosed subscription renewal supported by valid assent and applicable notices
- Boundary to test: transaction explicitly confirmed at the material decision point
- Boundary to test: purely free continuation with no material consequence
When a similar design can serve a legitimate purpose
- Clearly disclosed subscription renewal supported by valid assent and applicable notices
- transaction explicitly confirmed at the material decision point
- purely free continuation with no material consequence
Operational review
What teams should review
- Teams
- Which affirmative action authorises “No action means yes”, and where is the resulting price, product or recurring state shown before commitment?
- Capture every peer option, its default state and visual prominence; do those states support “A charge, supply or commitment occurs or is scheduled”?
- Which specific affirmative event creates the final commercial state, and could “Clearly disclosed subscription renewal supported by valid assent and applicable notices” explain the observed outcome instead?
- Which affirmative action authorises “No response recorded”, and where is the resulting price, product or recurring state shown before commitment?
- Count steps, waits, offers and channel changes through final confirmation; where does the route meet “No clear current assent to that consequence is evidenced”?
- Which specific affirmative event creates the final commercial state, and could “transaction explicitly confirmed at the material decision point” explain the observed outcome instead?
Evidence to retain
- Annotated subscription and cancellation screenshots at each responsive breakpoint
- The complete state sequence before, during and after the consumer decision
- Design-system component, content, default and configuration records for the reviewed release
- Operational records substantiating price, availability, timing and eligibility claims
- Usability, accessibility, reversal, complaint and support evidence relevant to consumer impact
- A dated product and legal review record identifying evidence, uncertainties and release decisions
Legal map and implementation tools
Evidence base
Sources
- An Ontology of Dark Patterns KnowledgeGray et al.; ACM CHI 2024 · Secondary · checked 2026-09-14 · DOI 10.1145/3613904.3642436; arXiv:2309.09640
- Competition and Consumer Amendment (Unfair Trading Practices) Act 2026Federal Register of Legislation · Primary · checked 2026-09-14 · C2026A00064
- Competition and Consumer Act 2010, including Schedule 2: Australian Consumer LawFederal Register of Legislation · Primary · checked 2026-09-14 · C2004A00109
- Unfair trading tricks and traps to be bannedTreasury Ministers · Primary · checked 2026-09-14
- Inquiry into the Competition and Consumer Amendment (Unfair Trading Practices) Bill 2026Senate Economics Legislation Committee · Primary · checked 2026-08-09