Inside unfair ranking complaint under EU rules: the seller's real options

TL;DRAn unfair ranking complaint under EU rules is a formal challenge available to marketplace sellers when a platform's product-ranking system operates in a way that is opaque, discriminatory, or tied to commercial payments without adequate disclosure. On Amazon IT and other Amazon EU surfaces, the Platform-to-Business Regulation (P2B Regulation) and the Digital Services Act (DSA) together create a set of enforceable obligations around how rankings are determined, disclosed, and contested. A seller does not have to accept a ranking drop as an unexplained business outcome. Procedural rights exist – but the path to using them effectively is narrow, time-sensitive, and often misread.

This analysis explains what those rights are, how the complaint mechanism works in practice on Amazon IT, and where the real decision points sit for a seller weighing whether to pursue a formal complaint, an internal escalation, or a different strategic route entirely.

The sections below move from the regulatory mechanics, through the procedural reality, to the operator trade-offs that ultimately drive the decision. If you have already made one filing that went nowhere, the complete EU marketplace regulation guide for sellers sets out the broader enforcement map before you commit to a second attempt.

What an unfair ranking complaint under EU rules actually is on Amazon IT

The P2B Regulation is the foundational instrument here: it requires platforms to set out, in their terms of service, the main parameters determining ranking and the relative importance of those parameters. Amazon IT, as a platform operating in Italy and subject to EU law, is bound by this obligation. An unfair ranking complaint is not a vague objection to poor organic performance. It is a structured challenge grounded in the claim that the platform either failed to disclose the ranking parameters accurately, applied those parameters inconsistently, conditioned ranking on a commercial relationship without disclosing that link, or changed the parameters without adequate prior notice.

That distinction matters enormously. In matters we handle involving EU sellers, the weakest filings are the ones that describe a sudden traffic drop and ask Amazon to explain it. The strongest filings identify a specific disclosure obligation, show the gap between what was disclosed and what appears to have occurred, and tie the harm to that gap. The regulatory framework does not require Amazon to achieve any particular ranking outcome for any seller. It requires the platform to be transparent about how ranking works and to apply its stated criteria consistently.

On Amazon IT specifically, the ranking parameters that appear in the platform's public terms cover factors such as sales velocity, conversion rate, customer reviews, fulfilment method, and participation in Amazon programs. What the terms historically have not disclosed in granular detail is the weighting between those parameters, the precise role of advertising spend in organic placement, or how algorithmic updates propagate. Those disclosure gaps are exactly where P2B-based complaints find traction – or fail, depending on how they are constructed.

The DSA adds a separate layer. Amazon, designated as a Very Large Online Platform (VLOP) under the DSA, carries additional transparency obligations for recommender systems and targeted exposure. Where a seller's ranking is partly driven by how the platform recommends products to users – as opposed to purely organic search ranking – the DSA's algorithmic transparency rules may apply alongside P2B. A complete unfair ranking complaint on Amazon IT therefore needs to assess which instrument applies to which aspect of the ranking behavior being challenged.

How does the procedural path actually work – and where does it stall?

The P2B Regulation requires Amazon IT to operate an internal complaint-handling system for business users. That system is the first mandatory step before any external escalation becomes available. A complaint filed directly with a national regulator or through a mediator, without first exhausting the internal path, will typically be declared inadmissible or deprioritized. The internal-complaint pathway is not optional bureaucracy. It is a jurisdictional threshold.

In practice, the internal complaint process runs through the Seller Central reporting and feedback mechanisms, escalated in writing to Amazon's dedicated point of contact for P2B matters. The written submission needs to be precise: it should identify the specific obligation under the P2B Regulation that the seller contends has been breached, describe the timeline of the ranking change or anomaly, attach whatever supporting data the seller can extract from Seller Central, and request a substantive written response. A complaint that simply says "my ranking dropped and I want an explanation" does not trigger the platform's substantive response obligation in the same way that a regulation-referenced, evidence-grounded submission does.

Amazon's response timeline under the internal complaint mechanism is not prescribed to the day, but the P2B Regulation does require that the mechanism operate effectively, which regulators have interpreted to mean a substantive response within a reasonable period. In matters we handle, the internal phase typically takes several weeks. If the response is inadequate – meaning it does not engage with the specific P2B or DSA obligation raised – that inadequacy is itself a documented fact for the next step.

The next step is mediation. The P2B Regulation requires platforms to identify at least two mediators in their terms of service. Amazon IT's terms do this. Mediation under P2B is not binding arbitration. It is a structured facilitation process that both parties must enter in good faith, but neither party is obliged to reach agreement. Its value is threefold: it creates a formal record, it sometimes produces a substantive concession from the platform that the internal process did not, and it is a prerequisite for certain enforcement actions by national authorities. The cost and timeline of P2B mediation vary by the identified mediator, but sellers should plan for a process that runs over a period of months, not days.

If internal complaint and mediation both fail to produce a satisfactory outcome, the external paths include a complaint to the relevant national competent authority – in Italy, this sits with a regulatory body with oversight responsibility for P2B compliance – and, where DSA obligations are implicated, a complaint to the Digital Services Coordinator for Italy or, at the European Commission level, for matters affecting the platform's VLOP obligations. These regulatory routes do not produce individual seller-level remedies quickly. They are more useful as strategic pressure points than as immediate relief mechanisms. We work through the appropriate framing for each route depending on what the seller actually needs: a reinstated ranking, documented evidence for a damages claim, or leverage in a broader commercial negotiation with the platform.

What the P2B and DSA obligations really require of Amazon – and what they do not

A common misreading among sellers pursuing these complaints is that EU law requires the platform to justify each individual ranking outcome. It does not. What the P2B Regulation requires is: first, that the main parameters and their relative importance be disclosed in terms that are plain and intelligible; second, that if any paid-for parameters exist (such as direct payments to improve ranking), those be clearly identified and distinguished from organic parameters; and third, that changes to the parameters be communicated with advance notice sufficient for sellers to adapt.

The DSA's recommender-system provisions go further for VLOP-designated platforms. Amazon IT sellers can now request, through the DSA's transparency mechanisms, information about the main parameters used in any recommender system that affects the display of their products to users. This is separate from the P2B ranking-parameter obligation. It covers product recommendation modules, personalized display, and algorithmic curation that shapes buyer exposure to a listing. In practice, the two instruments overlap on Amazon IT, because the platform's search and ranking infrastructure serves both discovery (more DSA-relevant) and organic commercial placement (more P2B-relevant).

What neither instrument requires is that Amazon optimize a seller's ranking, refrain from algorithm updates, or maintain any particular ranking position. The obligation is transparency and consistency of application. That scope limitation is not a weakness in the regulatory regime – it is the precise reason why a complaint needs to be built around a disclosed disclosure gap or an inconsistency in application, rather than around an objection to the outcome itself. We regularly see filings that are commercially valid objections but legally weak complaints, because the seller's loss is real but the specific regulatory breach is not clearly articulated.

The operator impact: what a ranking complaint is actually worth pursuing

Here is the question most sellers do not ask clearly enough: what outcome do I actually need, and is the P2B/DSA complaint path the fastest or most cost-effective route to that outcome?

For an Amazon IT seller whose ranking dropped following a disclosed algorithm update that was communicated in advance, the P2B complaint path is weak. The platform complied with its notice obligation. The commercial harm is real but the legal lever is thin. The realistic option in that scenario is optimization of the listing, review strategy, and fulfilment method – not a regulatory complaint.

For a seller whose ranking changed without any disclosed algorithm update, or whose ranking appears to correlate with a competitor's enrollment in a paid Amazon program in a way that was not disclosed in the ranking parameters, the P2B complaint path has genuine traction. The internal complaint phase creates a documented record. A well-constructed submission forces a written response from the platform. That response – or the failure to provide one – is usable in mediation and, if needed, in regulatory proceedings.

For an Amazon IT seller who is also experiencing restrictions on their account or listings alongside the ranking issue, the picture changes again. An EU marketplace suspension or delisting, even one dressed up as a ranking adjustment, triggers additional obligations under the P2B Regulation's restriction-and-termination provisions, which require the platform to provide a statement of reasons. That statement of reasons, and the internal complaint against it, are handled under a different – and in some respects stronger – set of obligations than a standalone ranking complaint. The guide on responding to a German marketplace suspension sets out how that statement-of-reasons process works and why the documentation at the initial stage is decisive.

A mid-market home-goods seller on Amazon IT (fall 2025) came to us after noticing a sustained ranking decline across its core product lines, concentrated on listings competing directly with Amazon's own private-label range. We reviewed the platform's disclosed ranking parameters, the account's traffic and conversion data from Seller Central, and the timeline of the decline relative to program changes disclosed by Amazon. The internal complaint was drafted around a specific disclosure-gap argument under the P2B Regulation and a separate recommender-system transparency request under the DSA. The seller received a substantive response from the platform – more detailed than is typical for an informally submitted complaint – and the matter progressed to the mediation phase with a clear evidentiary record. No outcome is guaranteed; the point is that a regulation-referenced, evidence-grounded submission opened a process that an informal complaint would not have.

Self-preferencing, the DMA, and when the complaint strategy shifts

For sellers who believe Amazon IT is ranking its own products or its preferred commercial partners above theirs in a systematic and undisclosed way, the Digital Markets Act (DMA) – not P2B – is the relevant instrument. Amazon has been designated as a gatekeeper under the DMA, and the DMA imposes a specific prohibition on gatekeepers self-preferencing their own products or services over third-party sellers in ranking, display, and indexing.

The DMA complaint path is different in structure. Complaints about gatekeeper obligations go to the European Commission, not to a national authority. Individual sellers can submit observations to the Commission in the context of a non-compliance investigation, but the Commission is not obliged to open an investigation based on a single seller's submission. The strategic value of a DMA-route complaint for an individual Amazon IT seller depends heavily on whether the behavior complained of is systemic and already under regulatory scrutiny, or is specific to the seller's account.

In practice, the DMA route and the P2B route are not mutually exclusive, and a well-structured complaint for an Amazon IT seller dealing with what looks like systematic self-preferencing in ranking will touch both instruments. The full analysis of self-preferencing complaints under the DMA covers the Commission submission process and the threshold a seller's evidence needs to meet to be taken seriously at that level.

An electronics accessories distributor on Amazon IT (spring 2026) raised what it believed was a self-preferencing issue: a sustained drop in organic ranking on a product line after Amazon IT introduced a comparable product in its own catalog. We assessed the evidence against both the P2B ranking-disclosure obligations and the DMA gatekeeper prohibitions. The P2B path was the operative one at the individual seller level; the DMA framing was preserved in the documentation as background. The internal complaint produced a written response acknowledging a parameter change that had not been adequately disclosed in advance. That acknowledgment was the leverage that moved the matter toward a substantive resolution in mediation.

Decision points and trade-offs: which path fits the seller's situation

The central trade-off in every unfair ranking complaint is time versus leverage. The internal complaint phase is relatively quick and low-cost but produces limited coercive force. Mediation is slower and has a cost, but creates a formal record and sometimes genuine platform engagement. Regulatory escalation is the slowest path and produces no individual-level relief quickly, but it creates documentary evidence, applies strategic pressure, and – in some instances – triggers enforcement action that benefits the seller class broadly.

If the notice or ranking change is tied to a specific disclosed program condition that the seller could meet – a fulfilment upgrade, a compliance certification, a product-safety documentation requirement – the fastest route is compliance, not complaint. A P2B complaint that runs for several months while the underlying condition goes unaddressed does not accelerate the ranking recovery.

If the ranking drop is accompanied by a statement of reasons (which the P2B Regulation requires for restrictions and terminations), the response to that statement is time-sensitive. In matters we handle, sellers who delay responding to a statement of reasons – treating it as an administrative formality rather than a legal trigger – lose the procedural advantage that prompt, regulation-referenced engagement would have created.

If the seller has already filed an informal complaint and received a non-substantive response, that response is usable. A second, properly structured filing that references the first response, identifies its inadequacy against the platform's P2B obligations, and escalates to the mediation path puts the matter on a different procedural track. What the seller should not do is file the same informal complaint a second time and expect a different result. The myth that EU sellers have no leverage once a platform declines their first complaint is exactly that – a myth. The leverage shifts with each step of the formal procedure, and the evidence accumulated at each stage is the asset that makes the next step stronger.

The realistic decision matrix runs like this: if the ranking drop is unexplained and recent, start with a documented internal complaint framed against the P2B disclosure obligation – the window is short, and a well-filed internal complaint costs little relative to what it preserves. If the internal response is inadequate, move to mediation with the internal record as the foundation. If mediation fails and the behavior is systemic, assess whether the DSA transparency route or the DMA path to the Commission adds anything. Throughout, keep documentation of the commercial impact: inventory costs, advertising spend adjusted in response to the ranking drop, and lost revenue in qualitative terms. That documentation supports any downstream damages framing, even if the P2B path itself does not produce damages directly.

Related areas

• EU Marketplace Regulation – account suspensions, P2B complaints, and DSA obligations for sellers on Amazon EU surfaces
• Amazon Account Reinstatement – Plan of Action drafting and appeal strategy for deactivated seller accounts

If your first complaint to Amazon IT produced no substantive response, or if the response you received failed to engage with the specific P2B or DSA obligation you raised, a second read can identify the precise failure point and what is still procedurally open. Email info@tutamenlaw.com to discuss what the record you have built actually supports.

FAQ: unfair ranking complaints under EU rules on Amazon IT

How long does resolving unfair ranking complaint under eu rules usually take on Amazon IT?

There is no fixed statutory timeline, and the duration depends heavily on which stage the complaint reaches. The internal complaint phase typically runs over several weeks. P2B mediation, if the internal phase does not produce a resolution, can extend over a period of months. Regulatory escalation to a national authority or the European Commission adds further time. Sellers should treat this as a process measured in months at the formal-procedure level, not days. The internal phase, if filed correctly and promptly, is the fastest pressure point and sets up every subsequent step.

What are the main risks if I handle unfair ranking complaint under eu rules alone?

The primary risk is procedural foreclosure. A complaint that does not identify the specific P2B or DSA obligation breached, or that is submitted informally rather than through the correct channel, can be resolved by the platform with a generic response that closes the internal path without creating a usable record. A second significant risk is failing to meet the notice requirements for the statement-of-reasons procedure, which is time-sensitive. Sellers who handle these filings alone also commonly conflate a commercial objection to an outcome with a legal claim about a disclosure breach – a distinction that determines whether the complaint has any regulatory force.

Do I need a lawyer for unfair ranking complaint under eu rules?

You are not legally required to have a lawyer at the internal complaint stage or in P2B mediation. The regulatory framework is designed to be accessible to business users. However, the practical difference between a regulation-referenced submission and an informal complaint is significant in terms of the platform's response and the record created. Attorney involvement is most valuable at the point of drafting the initial internal complaint – because the quality of that first document determines what is available at every later stage – and at the mediation phase if the internal response is unsatisfactory.

About Tutamen

Tutamen is an independent law firm for online marketplace sellers. We represent Amazon, Walmart, Etsy and eBay sellers in account deactivations, frozen-funds recovery, intellectual-property disputes, arbitration and Notices of Dispute, and US federal Schedule A defense, plus EU marketplace regulation. Our work is attorney-led and confidential, with fees quoted up front. We act for founders, brand owners and in-house teams who need a specialist for a marketplace dispute. Our EU practice is grounded in P2B Regulation procedure, DSA compliance obligations, and DMA gatekeeper enforcement – all handled on a fixed-fee basis after a short initial review. To discuss your situation, email info@tutamenlaw.com.

By Claire Donnelly – arbitration & disputes analyst, Tutamen. Published October 4, 2026.

Disclaimer: This article is general information, not legal advice, and does not create an attorney-client relationship. Marketplace policies and the law change, and every account and case is different. For advice on your situation, contact Tutamen at info@tutamenlaw.com.

Page authored by Claire Donnelly, Arbitration & Disputes Analyst, Tutamen.