Artifact GuideEU

DSA systemic risk assessments and mitigation for VLOPs and VLOSEs

A practical guide to the Digital Services Act duties for designated very large online platforms and very large online search engines: risk categories, mitigation measures, audit evidence, transparency publication, data access, and compliance governance.

Use it to shape evidence records for legal, trust and safety, product, recommender, advertising, data science, audit, public policy, and compliance teams without mixing VLOP/VLOSE systemic-risk duties with baseline platform obligations.

Author
Sorena AI
Published
May 9, 2026
Updated
May 26, 2026
Sections
6

Structured answer sets in this page tree.

Primary sources
8

Cited legal and guidance references.

Publication metadata
Sorena AI
Published May 9, 2026
Updated May 26, 2026
Overview

Under the Digital Services Act, systemic risk assessment and mitigation duties sit in the enhanced VLOP/VLOSE regime. They apply to online platforms and online search engines designated by the Commission after meeting the Article 33 scale threshold, not to every intermediary service. The core evidence file should show how the provider identified Article 34 systemic risks, selected Article 35 mitigation measures, tested and documented them, prepared for Article 37 independent audit, supported Article 40 data access, and kept Article 41 governance accountable.

Section 1

When the DSA systemic-risk duties apply

Article 33 applies the enhanced VLOP/VLOSE section to online platforms and online search engines with average monthly active recipients in the Union equal to or higher than 45 million, once designated by the Commission. The Commission VLOP/VLOSE overview also describes very large platforms and search engines as services with over 45 million users in the EU.

After designation, the service has four months before the enhanced duties in that section apply. A scope record should therefore identify the designated service, provider, EU main establishment, recipient-count basis, designation status, service features covered by the risk assessment, and the Digital Services Coordinator of establishment where relevant.

  • Do not treat generic hosting, notice-and-action, or marketplace duties as substitutes for Articles 34 and 35.
  • Map the assessment to each designated service, not only to the corporate group.
  • Preserve the AMAR calculation, Commission designation evidence, service boundary, and any material feature changes that could reopen the assessment.
  • Escalate new or changed functionality before launch when it is likely to have a critical impact on Article 34 risks.
Section 2

Article 34 risk assessment categories

The assessment must identify, analyse, and assess systemic risks in the Union stemming from the design or functioning of the service and related systems, including algorithmic systems, and from the use made of the service. It must be service-specific and proportionate to severity and probability.

The Article 34 categories are not a generic enterprise risk list. They cover dissemination of illegal content; actual or foreseeable negative effects on fundamental rights; actual or foreseeable negative effects on civic discourse, electoral processes, and public security; and actual or foreseeable negative effects linked to gender-based violence, public health, protection of minors, and serious consequences for physical and mental well-being.

  • Assess recommender systems and other algorithmic systems as risk drivers, not only as technical controls.
  • Include content moderation systems, terms-and-conditions enforcement, advertising selection and presentation, and data-related practices.
  • Analyse intentional manipulation, inauthentic use, automated exploitation, amplification, and rapid dissemination where they influence the risk categories.
  • Capture regional and linguistic aspects, including Member State-specific conditions when relevant.
Section 3

Evidence that makes the assessment auditable

Article 34 requires assessments by the applicable date for the designated service, at least annually thereafter, and before deploying functionalities likely to have a critical impact on the identified risks. It also requires supporting documents to be preserved for at least three years after each assessment.

A useful evidence file should let an auditor trace each conclusion from risk signal to mitigation choice: service map, feature inventory, algorithmic-system descriptions, content moderation metrics, advertising-system review, recommender testing, complaint and notice data, consultation inputs, data-governance records, severity and probability rationale, and management approval.

  • Keep a risk register with the Article 34 category, affected service surface, affected user or societal interest, severity, probability, evidence source, and residual-risk rationale.
  • Record which signals came from internal metrics, incident reports, complaints, trusted flaggers, external research, regulator requests, audits, or public transparency data.
  • Separate confidential working papers from the publishable report, but keep enough non-confidential detail to support Article 42 publication.
  • Link feature-release gates to the question of whether a functionality is likely to have a critical impact on systemic risks.
Section 4

Article 35 mitigation measures

Mitigation must be reasonable, proportionate, effective, tailored to the specific Article 34 risks, and assessed with particular consideration for fundamental-rights impacts. The evidence should explain why the measure fits the risk and why a less intrusive or more targeted measure would not achieve the same result.

Article 35 examples include adapting service design and interfaces, terms and enforcement, content moderation processes and resources, algorithmic and recommender systems, advertising systems, internal processes and supervision, cooperation with trusted flaggers and dispute-settlement decisions, codes of conduct or crisis protocols, user awareness and interface information, child-protection measures, and markings or reporting functions for generated or manipulated media.

  • For content risks, document notice-handling quality, resourcing, language coverage, escalation paths, and removal or access-disabling criteria.
  • For recommender and algorithmic risks, document test design, cohorts, metrics, human review, rollback criteria, and any non-profiling recommender option.
  • For advertising risks, document targeting controls, ad-placement limits, repository completeness checks, and political or sensitive-context handling where relevant.
  • For minors, health, well-being, and gender-based violence risks, document user-interface changes, reporting tools, support routes, age-related controls, and rights-impact review.
Section 6

Governance evidence and review checklist

Article 41 requires an independent compliance function with authority, resources, and access to the management body. The head of compliance reports directly to the management body and may warn it about Article 34 risks or non-compliance. The management body remains accountable for governance arrangements, risk-management policies, periodic review, and adequate resources.

A mature DSA risk program therefore needs governance evidence as much as product evidence: named compliance officers, reporting lines, management-body minutes, risk-policy approval, conflicts controls, resource decisions, audit supervision, and documented follow-up on risk, audit, and regulator findings.

  • Confirm the page-level scope: designated service, provider, Commission designation, and AMAR basis.
  • Show the Article 34 assessment: risk category, service design or use driver, affected rights or societal interest, severity, probability, evidence, and regional or linguistic factors.
  • Show the Article 35 response: mitigation owner, control design, effectiveness metric, fundamental-rights review, rollout status, and residual-risk decision.
  • Show assurance: independent audit plan, evidence repository, data-access readiness, audit findings, audit implementation report, and public Article 42 package.
  • Show governance: compliance-function independence, management-body review, escalation route, resource allocation, and review triggers for critical functionality changes.
Primary sources

References and citations

algorithmic-transparency.ec.europa.eu
Referenced sections
  • Commission ECAT page describing technical and scientific support for supervision of systemic obligations and Article 40 research access.
"Algorithmic transparency and accountability"
digital-strategy.ec.europa.eu
Referenced sections
  • Commission page explaining supervision roles, including Commission competence for enhanced VLOP/VLOSE systemic-risk obligations and shared competence for other obligations.
"enhanced due diligence obligations"
eur-lex.europa.eu
Referenced sections
  • Article 41 defines the VLOP/VLOSE compliance function, management-body accountability, and governance expectations for systemic-risk management.
"independent from their operational functions"
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