Why unfair ranking complaint under EU rules happens and how sellers respond

A seller on Amazon Italy notices that their listings have slipped. Traffic is down. Conversions are flat. The products have not changed, the price is competitive, and the account health dashboard is green. Yet another seller – in some cases Amazon's own retail operation – sits above them for the same search terms. On paper, the platform controls the algorithm. In practice, the Platform-to-Business Regulation, the Digital Services Act, and the Digital Markets Act give sellers a procedural set of tools that most never use. This page explains what an unfair ranking complaint under EU rules actually is, how it works on Amazon Italy, and what the realistic options are for a seller who believes the ranking system is not operating on the terms the platform disclosed.

TL;DRAn unfair ranking complaint under EU rules is a formal challenge, made under the Platform-to-Business (P2B) Regulation and, where applicable, the Digital Services Act or Digital Markets Act, in which a business seller asserts that a marketplace has ranked its products on grounds other than those disclosed in the platform's terms. On Amazon Italy, this means invoking the seller's right to a statement of reasons, using the internal complaint-handling system, and – where informal resolution fails – escalating to out-of-court dispute settlement or a competent EU authority. The process is procedural and evidence-led; it requires the seller to document the discrepancy between disclosed ranking criteria and observed outcomes before filing anything.

This analysis covers: what unfair ranking looks like on Amazon Italy and why it arises; the legal instruments that give sellers standing to complain; the realistic procedural path from internal complaint to escalation; the decision points and trade-offs at each stage; and what sellers should do before the window to act narrows.

What does "unfair ranking" actually mean for a seller on Amazon Italy?

Unfair ranking, in the EU regulatory sense, is not simply losing position in search results – it is a discrepancy between the ranking criteria a platform is legally required to disclose and the criteria it appears to apply in practice. The P2B Regulation requires marketplace operators to set out, in their terms and conditions, the main parameters used to determine ranking and their relative importance. Amazon publishes generic disclosure language. When a seller has evidence that the actual ranking behavior diverges from that disclosure – for example, that proprietary retail listings appear at the top of search results for reasons unrelated to the disclosed factors, or that a competitor who triggered a reporting mechanism suddenly displaced a high-performing seller – the regulatory gap opens.

In matters we handle, the pattern usually begins with an unexplained demotion. The seller has strong performance metrics: high ratings, fast dispatch, competitive pricing, and a healthy Account Health Rating in Seller Central. Then ranking drops, sometimes sharply, without any notice, any policy violation communication, or any change in the seller's own behavior. The instinct is to treat this as an algorithm update and wait. That instinct is often wrong. Waiting lets the commercial damage compound and narrows the procedural options the seller later has.

On Amazon Italy specifically, the enforcement environment adds a layer. Italy's competition authority, the Autorità Garante della Concorrenza e del Mercato (AGCM), has been active in the e-commerce space. The EU P2B Regulation applies directly; there is no transposition step. The DSA, which designates Amazon as a Very Large Online Platform (VLOP), adds transparency and accountability obligations that sellers can reference. The DMA, which designates Amazon as a gatekeeper, adds self-preferencing and data-access dimensions. These instruments do not operate independently of each other, and the strongest complaints typically weave together the most applicable threads.

A home-furnishings seller on Amazon Italy (spring 2026) came to us after a sustained ranking decline on their top five ASINs. Sales had fallen significantly over a two-month window. We mapped the account history, identified a period in which Amazon's own label appeared in Buy Box results above the seller's listings on identical or near-identical products, and built a documented discrepancy between the disclosed ranking parameters in Amazon's P2B-compliant terms and the observed outcome. That document became the foundation of the internal complaint.

Which EU legal instruments give sellers standing to challenge a ranking decision?

Three instruments are directly relevant, and each gives the seller a different procedural lever. Understanding which lever to pull – and in what sequence – is the core of the strategy.

The Platform-to-Business Regulation is the primary tool for ranking complaints. It applies to all business users of online intermediation services who have their place of establishment in the EU, regardless of where the platform operator is established. A seller incorporated in Italy and selling on Amazon.it is squarely within scope. The Regulation requires platforms to disclose the main ranking parameters in their terms, to explain the relative importance of those parameters, and to tell business users about any differentiated treatment of goods or services offered by the platform operator or parties it controls. When Amazon ranks its own retail listings or differentiates by seller type without disclosing that differentiation in its terms, the P2B obligation is potentially engaged. Critically, the Regulation also requires platforms to maintain an internal complaint-handling system. That system is not optional, and sellers have the right to use it before escalating.

The Digital Services Act extends the transparency frame. Amazon's designation as a VLOP imposes specific obligations around recommender systems – the algorithms that surface and rank content. Sellers can point to the DSA's requirements on explainability and, where a statement of reasons was not provided for a restrictive measure, use the absence of that statement as a procedural ground in their complaint.

The Digital Markets Act sits at a different level. It targets gatekeepers – the largest platforms – and specifically prohibits self-preferencing: ranking a gatekeeper's own products or services more favorably than those of third-party business users. DMA complaints go to the European Commission, not to the platform's internal system. That makes DMA escalation a distinct track, not a substitute for the P2B internal complaint. For a seller on Amazon Italy, a DMA pathway is more appropriate for systemic self-preferencing patterns than for a single-account ranking issue.

For a comprehensive overview of how these instruments interact for sellers across EU marketplaces, the analysis in our EU marketplace regulation guide for sellers sets out the full picture.

Why does a ranking complaint arise – and what triggers it commercially?

Ranking complaints arise at the intersection of three pressures: algorithmic opacity, commercial conflict of interest, and inadequate disclosure. Each of these is present on Amazon Italy to some degree, and together they create the conditions in which legitimate third-party sellers lose position to outcomes that the regulatory regime was designed to prevent.

Algorithmic opacity means that sellers generally cannot see inside the ranking engine. They observe inputs – pricing, fulfillment method, review velocity, advertising spend – and they observe outputs – position in search results, Buy Box share. The connection between the two is mediated by an algorithm the platform does not fully disclose. The P2B Regulation was partly designed to address this gap, but the obligation is to disclose main parameters, not to publish the algorithm. This leaves significant room for a seller to observe an unexplained outcome while the platform can point to disclosed parameters and say it is compliant.

Commercial conflict of interest is the harder problem. Amazon operates as both a marketplace and a retailer. When Amazon's own label or a preferentially contracted seller competes for the same search terms as a third-party seller, the ranking algorithm is producing outcomes that affect Amazon's own commercial position. The DMA's self-preferencing prohibition exists specifically because this conflict was identified at the regulatory level as structural and not self-correcting. Sellers who see Amazon retail listings above their own for identical search terms, without a clear quality or pricing differential to explain the gap, are observing the commercial dimension of this conflict directly.

Inadequate disclosure creates the legal standing. If Amazon's disclosed ranking parameters do not mention or explain differentiated treatment of its own retail products, and a seller can show that such differentiation is occurring, the gap between disclosure and practice is the core of a viable complaint. This is not a legal theory requiring a court to accept it at first instance. The internal complaint-handling system that the P2B Regulation requires is the first place it is tested – and it is a lower-threshold environment than litigation.

What is the realistic procedural path for a seller who wants to file a complaint?

The procedural path under EU rules runs in a defined sequence: internal complaint first, then escalation – either to out-of-court dispute settlement or to a competent authority. Skipping the internal step generally weakens the escalation case and may be procedurally required before certain escalation routes are available.

Step one is building the evidentiary record before any filing. This means capturing search result screenshots with timestamps, ranking position data over time, a comparison of the seller's metrics against publicly observable metrics for competing listings, and the specific section of Amazon's terms that contains the ranking disclosure. This documentation work is not optional. A complaint filed without an evidentiary record is easy to dismiss on procedural grounds. We regularly see sellers file too early, before the record is strong enough to resist the platform's first-line response.

Step two is the internal complaint. Under the P2B Regulation, platforms must acknowledge internal complaints within a reasonable period and assess the complaint proportionate to its importance and complexity. Amazon's internal complaint-handling system for business users is accessible through Seller Central. The complaint must be framed precisely: it is not a general dissatisfaction with rankings. It is a documented assertion that the ranking criteria applied to the seller's listings diverge from the criteria disclosed in the terms, with evidence. The response from Amazon's internal system is often formulaic at the first level. That response, whatever it says, is part of the procedural record and is relevant to any escalation.

Step three, if the internal complaint does not resolve the matter, is out-of-court dispute settlement. The P2B Regulation requires platforms to identify, in their terms, at least two mediators willing to work with business users. The mediation route is distinct from litigation and has a different cost and time profile. It is not always the right tool – if the complaint involves structural self-preferencing, mediation with a mediator identified by the platform has obvious limits – but for a discrete ranking issue on a specific ASIN cluster, it can produce a result faster than an authority process.

Step four is authority escalation. In Italy, the AGCM has jurisdiction over P2B Regulation complaints. The European Commission handles DMA matters. The Digital Services Coordinator system handles DSA matters. Choosing the right authority for the right instrument is a strategic decision, not a clerical one. Filing the same complaint under all three instruments simultaneously can create procedural confusion and slow the most promising track.

The approach to self-preferencing complaints under the DMA – which often overlaps with a ranking complaint – is detailed in our analysis of why self-preferencing complaints under the DMA arise.

Where does the seller's procedural record live, and what does it need to contain?

The evidentiary record is the asset that the seller controls directly, and it is the most important element of the entire complaint process. Every other step depends on it. A strong record makes the internal complaint harder to dismiss and the escalation path clearer. A weak record – or no record at all – is the single most common reason complaints fail at the earliest stage.

The record needs to contain at minimum: the ranking disclosure from Amazon's applicable terms (the version in force at the relevant time, preserved as a PDF); contemporaneous screenshots of search results showing the seller's position relative to competitors and Amazon retail listings, with dates and timestamps; performance data from Seller Central showing the seller's metrics at the time of the ranking decline; a timeline mapping when the decline began against any observable changes in the competitive environment; and, where available, data on advertising spend changes that might otherwise explain the shift.

The record also benefits from a comparison document: the seller's disclosed-parameter metrics against what the disclosed parameters predict, and then against what the observed ranking shows. If the seller meets or exceeds the disclosed criteria and still ranks below a competitor who does not, the gap is visible in the comparison document.

One thing the record cannot contain is speculation. Asserting that Amazon disfavors independent Italian sellers, without specific evidence tied to the disclosed parameters, is not a complaint under EU rules. It is an opinion. The regulatory instruments require a documented discrepancy, and the complaint must be framed in those terms.

We build this record as a first step in matters we handle on Amazon Italy and other EU marketplace surfaces. The scoping phase – reviewing the account history, extracting the relevant terms text, and mapping the ranking data – determines whether a viable complaint exists before any filing is made. That prevents sellers from using the internal complaint mechanism on a case that the evidence does not support, which would weaken a later complaint that might be better founded.

What are the seller's decision points and trade-offs at each stage?

The decision to file an internal complaint is relatively low-cost and low-risk. It creates a procedural record. It obligates Amazon to respond. It may, in some cases, prompt a review that resolves the issue at the platform level without escalation. The main risk is that a poorly framed complaint generates a response that is then used against the seller in a later escalation, so framing matters even at the internal stage.

The decision to escalate to out-of-court mediation carries a cost and a time commitment. Mediation identified by the platform is not neutral by design, and sellers should assess realistically what a platform-identified mediator is likely to achieve. Where the complaint involves structural self-preferencing, mediation is unlikely to produce a systemic remedy. For a specific ranking problem on a defined ASIN set, mediation can be faster and cheaper than an authority process, and it may deliver a practical result – a reviewed ranking decision, a change in treatment for a specific category – even if it does not produce the broader principle the seller wanted.

The decision to file with the AGCM or the European Commission is a different order of commitment. Authority proceedings take time. The seller does not control the pace or the outcome. The authority may accept the complaint and investigate, or it may decline on jurisdictional or prioritization grounds. Filing with an authority is most appropriate when the complaint documents a pattern – not just a single-seller event – because authorities are more likely to act on matters with broad applicability. A seller who has documented evidence of systematic self-preferencing across a category on Amazon Italy has a stronger basis for an AGCM referral than a seller whose ranking declined for reasons that might be specific to their account.

What do sellers often get wrong? They treat the EU complaint mechanism as a customer-service escalation. They submit unstructured grievances to the internal system, receive a form response, and conclude that EU rules have no effect. In our practice, the sellers who get traction are those who treat the complaint as a procedural document – precise, evidence-led, and tied to a specific regulatory obligation that the platform has not met.

The decision to engage legal representation at the outset versus later is also a real trade-off. Representation at the internal complaint stage costs more upfront. It also reduces the risk of a procedural misstep that forecloses the escalation options. For a seller whose revenue on Amazon Italy is significant and whose ranking decline is sustained, the cost of a weak internal complaint is measured in weeks of lost sales – which often exceeds the cost of getting the complaint right the first time.

For sellers dealing with a suspension rather than a ranking issue, the procedural steps on the German marketplace follow a parallel but distinct path; see our guide on German marketplace suspension – what to do step by step, which covers several of the same regulatory instruments in a different enforcement context.

What sellers get wrong about EU marketplace leverage

The most persistent myth in this area is that EU sellers have no practical leverage once a platform has changed or suppressed their ranking. That belief is wrong, and it is commercially costly for the sellers who hold it. The P2B Regulation, DSA, and DMA represent a legislative intervention specifically designed to address power imbalances between large platforms and business users. The instruments exist because regulators concluded that voluntary market correction would not happen.

Leverage under these instruments is procedural and evidence-dependent. It is not automatic. A seller cannot point to a ranking decline and assert EU law and expect a remedy. They must do the documentation work, use the prescribed procedural path, and frame the complaint in regulatory terms. That is what makes legal representation valuable at this stage – not because the law is obscure, but because the procedural framing determines whether the complaint lands or gets dismissed on its first review.

A second misconception is that EU complaints are only useful for sellers with large turnovers or politically visible cases. Authority investigations may prioritize high-profile matters. But the internal complaint-handling system under P2B applies to every business user regardless of size. A seller turning over a mid-range figure on Amazon Italy has exactly the same right to invoke the internal complaint system as a large distributor. The constraint is evidence quality, not size.

A third misconception is that filing a complaint will cause Amazon to retaliate by suspending the account. In matters we handle, we have not observed account suspension following a properly filed P2B internal complaint. The regulatory framework creates liability for platforms that take retaliatory action against business users who exercise their rights. That does not mean the risk is zero, but it is not the near-certain retaliation that some sellers fear. Framing and confidentiality in the filing process are relevant to managing this risk.

A second micro-case: a software-accessories seller on Amazon Italy (winter 2025) had experienced a persistent ranking decline that did not respond to any of the standard seller interventions – price adjustment, advertising uplift, review solicitation. We reviewed the P2B disclosure language in Amazon's applicable terms, identified a gap in how differentiated treatment of competing retail listings was explained, built a comparison document mapping the seller's metrics against observed ranking outcomes, and filed a structured internal complaint. The complaint produced a substantive – if partial – response from the internal system and opened a dialogue that resulted in a ranking review for the affected ASINs. The seller's position did not fully recover, but the review itself confirmed that the complaint mechanism functions and produces a response.

How Tutamen approaches unfair ranking complaints under EU rules

When a seller on Amazon Italy – or another EU marketplace – brings us a ranking concern, the first step is a scoping review. We examine the account history, extract the relevant terms text, and map the available ranking data. That review tells us whether the evidence supports a viable complaint under the P2B Regulation, whether the DSA or DMA adds useful grounds, and which procedural path is most appropriate for the specific facts.

If the scoping review supports a complaint, we build the statement-of-reasons and internal-complaint case, frame the filing in the precise language the regulatory instrument requires, and use the DSA, P2B, and DMA levers that apply. Where the internal system does not resolve the matter, we advise on out-of-court mediation, authority referral, and – for systemic patterns – the DMA track to the European Commission.

Our work on EU marketplace regulation is attorney-led and confidential. Fees for an EU ranking matter begin with a fixed scoping fee, quoted up front after a short initial review of the account and the available ranking data. That scoping determines whether full representation is warranted and what it would involve. We work with appropriate local counsel where the matter requires Italian-law procedural steps or AGCM representation. No invented estimates, no retainer structures that scale without the seller's knowledge.

If your ranking has declined on Amazon Italy and you believe the cause is not your own performance, the question is whether the gap between what the platform disclosed and what it did is documented enough to support a formal complaint. That is exactly what the scoping review is designed to answer. To arrange a review, email info@tutamenlaw.com.

Related areas

• EU Marketplace Regulation – complete guide for sellers – the full regulatory map for Amazon and other EU platforms
• DMA self-preferencing complaints – when the DMA gatekeeper rules apply to ranking and access
• German marketplace suspension – parallel EU procedural steps in the Amazon DE context

Frequently asked questions about unfair ranking complaints under EU rules

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

Resolution timelines vary with the procedural route and the strength of the evidentiary record. An internal complaint under the P2B Regulation typically draws a response within several weeks, though that response may be a partial or formulaic acknowledgment rather than a substantive resolution. If the matter escalates to out-of-court mediation, the timeline extends to several months. An authority process before the AGCM or the European Commission operates on a longer horizon still, often measured in quarters rather than weeks. The fastest outcomes in matters we handle have come from well-framed internal complaints backed by strong evidentiary records, where the documented discrepancy is specific and tied to a verifiable gap in the platform's disclosure.

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

The primary risk is procedural: a complaint that is not framed in regulatory terms – the specific obligation under P2B, DSA, or DMA that the platform has not met – is easy to dismiss at the first-level internal review. Once dismissed, a poorly framed complaint creates a record that can be used against the seller at the next stage. Sellers who self-file also frequently omit the evidentiary comparison document that gives the complaint its specificity. A second risk is timing: sellers who wait too long to document the ranking decline lose contemporaneous evidence that is difficult to reconstruct. A third risk is choosing the wrong escalation path – for example, filing with the European Commission on a single-account issue rather than using the internal complaint system first, which is typically a prerequisite for later escalation.

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

Legal representation is not a formal requirement for filing an internal complaint under the P2B Regulation. The Regulation is specifically designed to be accessible to business users without requiring them to litigate. That said, in matters we handle, the quality of legal framing at the internal stage determines whether the complaint produces a substantive response or a form letter. A dsa seller rights complaint that references the correct regulatory obligation, cites the disclosure gap with precision, and attaches a structured evidentiary record performs better than an unstructured grievance. For sellers whose commercial exposure on Amazon Italy is significant, the cost of professional framing at the outset is usually lower than the cost of a failed first filing and the narrowed options that follow.

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. Work on EU ranking matters is attorney-led from the scoping review through any escalation, with fixed fees that are transparent before any filing is made. To discuss your situation, email info@tutamenlaw.com.

By Claire Donnelly – arbitration & disputes analyst, Tutamen

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

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.