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
Oct 15, 2026
Overview

Under the Digital Services Act, 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.

The enhanced duties in that section apply four months after the provider is notified of the Commission designation decision. 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 average monthly active recipient (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. DSA recital 90 says providers should, where appropriate, involve representatives of recipients, potentially affected groups, independent experts, and civil-society organisations in risk assessments and mitigation design. Article 42(4) requires publication of information about those consultations where applicable.

  • 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.
  • Consultation record: explain whether stakeholder consultation was appropriate, who represented affected groups or recipients, what evidence or concerns they supplied, how the assessment used that input, and why any relevant group was not consulted.
  • 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 DSA risk program 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 assessment 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

eur-lex.europa.eu7 citations
Referenced sections
  • Primary legal text for Articles 33, 34, 35, 37, 40, 41, and 42 on VLOP/VLOSE systemic-risk obligations, audits, data access, governance, and reporting.
  • Article 33 sets the VLOP/VLOSE threshold, designation mechanism, and four-month application point for enhanced systemic-risk duties.
  • Article 34 defines the systemic risk categories and the factors that VLOPs and VLOSEs must consider in their assessments.
Show 4 more
  • Article 34 sets assessment cadence, pre-deployment assessment triggers, and the three-year supporting-document preservation duty. Recital 90 addresses stakeholder involvement, and Article 42(4) requires publication of consultation information where applicable.
  • Article 35 lists the types of mitigation measures and requires them to be tailored to identified systemic risks.
  • Articles 37, 40, and 42 connect independent audits, data access, audit implementation reports, and public reporting to the risk assessment and mitigation program.
  • Article 41 defines the VLOP/VLOSE compliance function, management-body accountability, and governance expectations for systemic-risk management.
"identify, analyse and assess"
More quoted passages
"equal to or higher than 45 million"
"at least once every year"
"reasonable, proportionate and effective"
"make publicly available"
"independent from their operational functions"
eur-lex.europa.eu4 citations
Referenced sections
  • Audit rules and templates for assessing VLOP/VLOSE compliance with risk assessment, mitigation, audit evidence, and audit implementation duties.
  • Audit rules require auditors to examine risk-assessment reports, supporting documents, internal controls, compliance officer work, and management-body involvement.
  • Audit rules define reasonable assurance, audit conclusions, audit-risk analysis, audit evidence, sampling, and templates for audit and implementation reports.
Show 1 more
  • Audit methodology rules require examination of internal controls, compliance officer performance, and management-body involvement for Article 34 assessments.
"audit implementation report"
More quoted passages
"supporting documents"
"reasonable level of assurance"
"internal controls"
digital-strategy.ec.europa.eu3 citations
Referenced sections
  • Commission overview of VLOP/VLOSE designation, 45 million user threshold, enhanced duties, audits, data sharing, researcher access, and recommender and advertising obligations.
  • Commission overview explaining that VLOPs and VLOSEs are subject to the DSA's most stringent rules after designation.
  • Commission overview summarising the systemic-risk categories for VLOPs and VLOSEs.
"most stringent rules of the DSA"
More quoted passages
"over 45 million users in the EU"
"illegal content"
algorithmic-transparency.ec.europa.eu2 citations
Referenced sections
  • Commission ECAT page on technical support for supervision of systemic obligations and researcher access to platform data on systemic risks.
  • Commission ECAT page describing technical and scientific support for supervision of systemic obligations and Article 40 research access.
"systemic obligations"
More quoted passages
"Algorithmic transparency and accountability"
digital-strategy.ec.europa.eu2 citations
Referenced sections
  • Commission governance page explaining Digital Services Coordinator roles and the Commission's supervision of enhanced VLOP/VLOSE systemic-risk obligations.
  • Commission page explaining supervision roles, including Commission competence for enhanced VLOP/VLOSE systemic-risk obligations and shared competence for other obligations.
"systemic risks"
More quoted passages
"enhanced due diligence obligations"
digital-strategy.ec.europa.eu2 citations
Referenced sections
  • Commission Article 35 guidance for electoral-process risk mitigation and related transparency, audit, data access, advertising, recommender, crisis, and statement-of-reasons obligations.
  • Commission Article 35 guidance for electoral-process risks, cross-linking mitigation with recommender, advertising, transparency, audit, crisis, and data-access obligations.
"mitigation of systemic risks"
More quoted passages
"risks linked to electoral processes"
digital-strategy.ec.europa.eu2 citations
Referenced sections
  • Commission transparency page covering VLOP/VLOSE transparency reports, data access, risk assessment reports, audit reports, and audit implementation reports.
  • Commission transparency page explaining risk assessment, audit, audit implementation report publication, and DSA data access channels.
"Risk assessment and audit reports"
digital-strategy.ec.europa.eu2 citations
Referenced sections
  • Commission table for designated services, reported user counts, Digital Services Coordinators, and enforcement actions.
  • Commission supervision table showing designated services, user counts, Digital Services Coordinators, and enforcement activity.
"main enforcement activities"
More quoted passages
"designated Very Large Online Platforms"
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