UK Online Safety Act User-to-user and Search Services
A service can fall within Part 3 if users can encounter content generated, uploaded, or shared by other users, or if it provides a search engine across more than one website or database.
The provider must then check UK links, Schedule 1 and Schedule 2, disapplied service parts, and who controls the relevant functionality. Company location and service size do not decide scope by themselves.
Use four tests in order. First, decide whether the product contains a , a , or both. Second, identify the entity that controls access to the user-to-user functionality or controls search operations. Third, decide whether the service has . Fourth, test the specific and Schedule 2 exemptions and any disapplied parts. A regulated service then has baseline illegal-content, reporting, complaints, record-keeping, and assessment duties; child-access and category status can add further duties.
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Section 1
How do you classify the service functionality?
A user-to-user classification turns on functionality, not the product label. Ask whether content generated, uploaded, or shared by one user may be encountered by another. Comments, public or group posts, user profiles, user-uploaded media, marketplace listings, in-game chat, collaborative spaces, and some messaging functions can meet the test. The exemptions still need separate analysis.
For search, ask whether a person can search more than one website or database. A general search engine and a vertical search engine for products, jobs, travel, academic material, or another topic can qualify. A search tool restricted to one website or database does not meet section 229 merely because it has filters or sophisticated ranking.
If the service has both functions, apply the section 3 tie-breaker. Unless the only user content is within the specified exempt types, it is treated as a ; if the same provider also operates a public search engine, it is a and search duties apply to that engine.
Inventory every function through which a user creates, uploads, shares, searches, ranks, recommends, comments on, or encounters content.
Record whether communications are public, group, one-to-one, live, aural, asynchronous, internal, or attached to provider content.
For each search function, record the websites and databases searched and the entity that controls indexing, ranking, and results.
Classify distinct functions and service parts before deciding whether an exemption or section 5 disapplication covers all or only part of the product.
Who is the provider, and does the service have UK links?
The responsible entity is not necessarily the brand owner, app-store operator, parent company, or company named in a customer contract. Section 226 generally identifies the user-to-user provider by control over who can use the relevant user-to-user elements. For search, the provider is the entity with control over the operations that accept requests and generate results.
After identifying the provider, apply section 4. UK establishment is not required. A significant UK user base or a UK target market is enough. A service accessible in the UK can also qualify where there are reasonable grounds to believe its user-generated content or search content creates a material risk of significant harm to people in the UK.
The Act does not set a general minimum revenue, employee, or user threshold for baseline Part 3 scope. Category thresholds decide additional duties; they do not decide whether an otherwise regulated service has the baseline duties.
Draw the entity and control chain for account access, posting, sharing, moderation, indexing, ranking, and search-result generation.
Keep dated evidence for UK users, UK marketing and localisation, UK commercial strategy, accessibility from the UK, and UK-specific harm signals.
Do not treat low UK traffic as conclusive if the service targets the UK or presents a material risk of significant harm in the UK.
Revisit the provider and UK-links analysis after acquisitions, outsourcing, platform migrations, market launches, or changes in operational control.
exemptions are specific, not broad sector labels. They cover services whose only user-generated content is email, SMS or MMS, or one-to-one live aural communications; defined limited-functionality services; qualifying internal business services; specified public-body services; and qualifying education or childcare services. Each exemption has conditions, and some operate at service-part level.
The limited-functionality exemption generally concerns comments or reviews on provider content and sharing those comments or reviews elsewhere. It does not exempt a service that also enables wider user interaction. The education and childcare exemption applies only to the providers and purposes described in , not every product sold to a school or used by a child.
Schedule 2 deals with certain services that combine otherwise exempt user-to-user or search functions with provider pornographic content. Those services may remain regulated under Part 5 even when the Part 3 user-to-user or search duties do not apply. Section 5 can also disapply the Act to defined low-risk parts without taking the whole service out of scope.
Test the exact content and functionality conditions for an exemption; do not stop at the product name or industry.
Check the exception to the email, messaging, aural, limited-functionality, and combination exemptions in paragraph 6.
For internal tools, document the corporate relationship, permitted users, purpose, and whether a public or customer-facing part sits outside the exemption.
For pornography, education, childcare, and public-body cases, record the separate statutory conditions and any duty that remains under another Part.
Every regulated must complete an illegal-content risk assessment and maintain the required reporting, complaints, freedom-of-expression, privacy, record-keeping, and review controls. The safety duties differ: user-to-user services address user-generated content and the use of the service to commit or facilitate priority offences, while search services address risks arising through search content and results.
The provider must also complete a . If the service or a relevant part is likely to be accessed by children, children's risk-assessment and safety duties apply. Category status can add transparency, user-empowerment, fraudulent-advertising, and other duties, but it does not replace the baseline classification.
Is a service outside the Act because it has few UK users?
Not necessarily. A significant number of UK users is only one route to . A UK target market is another. A service accessible in the UK can also qualify where there are reasonable grounds to believe its user-generated content or search content creates a material risk of significant harm to people in the UK.
Is an internal search box a ?
Not if it searches only one website or one database. Section 229 requires search across some or all websites or databases and expressly excludes a service or functionality limited to one website or database. A vertical search engine covering multiple sources can qualify even if it covers only one topic.
Are email and private messages always exempt?
No. exempts services whose only user-generated content is email, SMS or MMS, or one-to-one live aural communications, subject to the schedule's conditions and exceptions. A wider service with posts, group communications, profiles, uploads, comments, or other user interaction needs a function-by-function analysis.
Approve a scope memo with the feature inventory, provider entity, UK-links evidence, exemption analysis, service-part boundaries, and unresolved questions.
Open separate duty maps for the user-to-user and search components of a .
Trigger reassessment before adding public comments, messaging, uploads, group interaction, multi-database search, or a new UK market.
Keep child-access and category decisions as later branches; do not use them to erase baseline Part 3 duties.
Binding source for service definitions, regulated status, exemptions, service-part boundaries, provider identity, and the duties following classification.
Official overview confirming that the duties apply to search services and services that allow users to post content or interact with each other, including providers outside the UK with UK links.