How to handle unfair ranking complaint under EU rules: a step-by-step guide

Ranking visibility on Amazon IT is not just an algorithmic courtesy – it is revenue. When a seller's product drops from page one to page four overnight, or when a competitor's complaint triggers a formal review of how Amazon orders search results, the commercial damage is immediate and measurable. An unfair ranking complaint under EU rules is one of the more precise tools available to marketplace sellers operating in Italy and across the EU, yet it is also one of the most mishandled.

TL;DRAn unfair ranking complaint under EU rules is a formal challenge – grounded in the Platform-to-Business (P2B) Regulation and, for Amazon as a designated gatekeeper, the Digital Markets Act (DMA) – asserting that a marketplace has not applied its ranking parameters transparently, consistently, or fairly. On Amazon IT, sellers can use both Amazon's internal complaint-handling system and EU regulatory channels to raise and resolve such challenges. The realistic path involves several sequential steps, and which avenue a seller uses first shapes what remains available later.

This guide walks through each step in the correct order, identifies where sellers most often lose ground, and explains the decision points that determine whether an internal complaint or an escalation to a regulator is the right move for a given situation.

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

The P2B Regulation requires Amazon and other marketplace operators to explain, in their terms and conditions, the main parameters that determine how products and offers are ranked in search results – and to disclose when any self-preferencing arrangement might affect that order. Failing to do so, or applying undisclosed parameters that push a third-party seller's listings down while elevating Amazon's own retail or private-label offers, is the core conduct that an unfair ranking complaint targets.

A "ranking complaint" in this context is not simply a seller asking why their product moved. It is a structured challenge asserting that Amazon has not met its legal transparency obligations, or that the ranking outcome cannot be explained by the published parameters. The distinction matters. Amazon's internal systems can dismiss a vague request for explanation. They are procedurally required to treat a rights-based complaint differently.

On Amazon IT specifically, the P2B Regulation applies directly because Italy is an EU member state. The DMA adds a further layer: Amazon was designated as a gatekeeper under the DMA, which means additional obligations around self-preferencing and fair access apply to the Italian storefront as they do across all EU surfaces. The DMA's gatekeeper obligations include requirements on transparent and non-discriminatory ranking conditions for third-party sellers. This creates overlapping grounds for a complaint, and choosing which ground to lead with is a strategic decision, not a formality.

In matters we handle on Amazon IT, sellers often arrive having already sent a general inquiry through Seller Central and received a generic auto-response. That response is not the end of the road. It is, in procedural terms, the starting point for the next step.

Step 1 – Document the ranking change before doing anything else

The single most common mistake sellers make when they suspect an unfair ranking change is responding immediately – either by adjusting price, changing the listing, or sending an angry message through Seller Central. All of that happens before they have captured the evidence. By the time they want to file a formal complaint, the data that would have supported it is gone.

Before drafting any communication to Amazon, do the following:

• Take dated screenshots of the current search results for the relevant keywords on Amazon.it, including your product's position and any Amazon-owned or Amazon-exclusive offers appearing above it.
• Pull your Seller Central search-term reports for the period immediately before and after the ranking change. Note the date the change became visible.
• Identify the specific ASIN or ASINs affected and cross-reference against any policy notices, suppression notices, or account health events from the same period.
• Check whether Amazon's own retail offers or sponsored placements now occupy the positions your organic listing previously held.
• Note whether the ranking parameters disclosed in Amazon's P2B-compliant terms and conditions can plausibly explain the shift. If the disclosed parameters – relevance, price, availability, customer satisfaction – all favor your listing, the gap between disclosure and outcome is the substance of your complaint.

This documentation exercise typically takes one to three business days to do properly. It is not optional. Without it, a formal complaint becomes an assertion without evidence, and both Amazon's internal system and any regulator will treat it accordingly.

Where this step goes wrong: sellers capture screenshots but not the date-stamped search-term data. They also frequently forget to document Amazon's own ranking explanation – which is the text Amazon publishes in its P2B ranking transparency statement. That statement is what you are measuring the outcome against.

Step 2 – Read Amazon's published ranking parameters and identify the specific gap

Amazon publishes a ranking transparency statement as required by the P2B Regulation. Before filing anything, a seller must read that statement carefully and identify precisely which element is either absent, vague, or contradicted by the observed outcome.

The P2B Regulation does not require Amazon to explain every algorithmic signal. It requires disclosure of the main parameters and their relative importance. A complaint that says "your ranking algorithm is unfair" without specifying which disclosed parameter was not applied – or which undisclosed parameter was applied instead – will be dismissed on procedural grounds. The complaint must be specific.

Common grounds for a specific complaint on Amazon IT include:

• The ranking statement discloses that customer satisfaction metrics are a main parameter, but the seller's metrics demonstrably improved during the period the ranking dropped.
• Amazon's own retail offer or a sponsored listing appears in a position that the disclosed organic parameters cannot explain.
• A competitor's offer with objectively weaker price, availability, or review scores ranks higher, suggesting an undisclosed parameter is operative.
• Amazon changed the ranking outcome after the seller declined to participate in a specific Amazon program (for example, a fulfillment or advertising arrangement), suggesting a conditional relationship between program participation and organic visibility.

The last ground – ranking outcomes conditioned on program enrollment – is directly addressed by DMA gatekeeper obligations. Article 6(5) of the DMA prohibits gatekeepers from using non-public data generated by business users to compete against those users – and the ranking context is where that prohibition intersects with daily seller experience. We note that specific DMA article numbers are cited here for reference to the instrument as a whole; sellers should verify the exact operative provision at the time of filing, as implementing guidance evolves.

Once the specific gap is identified in writing, the seller has the core of the complaint. Everything that follows is a matter of routing it correctly.

Step 3 – File through Amazon's internal complaint-handling system first

The P2B Regulation requires Amazon to operate an internal complaint-handling system for business sellers. Using it first is not just good practice – it is the procedurally correct sequence. Some regulatory bodies will ask whether internal remedies were exhausted before a formal complaint was accepted. Skipping this step can therefore slow an escalation rather than speed it up.

The internal complaint should be addressed through Seller Central's formal channels rather than through a standard support ticket. The distinction in routing may seem minor, but it affects how Amazon categorizes the communication internally and, consequently, how quickly a substantive response is required.

The complaint itself should:

1. Identify the affected ASIN or ASINs and the date range of the ranking change.
2. State the specific P2B and/or DMA obligation you believe has not been met.
3. Attach the documentation captured in Step 1.
4. Quote the relevant language from Amazon's published ranking transparency statement and explain the specific gap between that disclosure and the observed outcome.
5. State clearly what remedy you are seeking – re-ranking review, a written explanation of the parameters applied, or correction of an undisclosed parameter.

Amazon is required under the P2B Regulation to handle such complaints diligently and in good faith. In our experience handling EU-based seller matters, "in good faith" means the response should be substantive rather than a template. If the response is a template, that fact becomes relevant in a subsequent escalation.

Realistic timeline for this step: Amazon's internal complaint-handling system does not carry a statutory deadline under the P2B Regulation in every scenario, but repeated or persistent non-response becomes its own evidence. A period of several weeks without a substantive response is generally enough to move to the next stage.

Step 4 – Evaluate the response and decide whether to escalate

This is the decision point that most sellers handle poorly, either because they accept an unsatisfactory internal response and stop, or because they escalate immediately to a regulator without considering whether there are faster parallel routes.

After Amazon's internal response, the seller has three realistic options. First, the response is substantive and explains a legitimate ranking parameter the seller had not accounted for. In that case, the complaint is resolved, even if the outcome is not what the seller wanted. Second, the response is a template or a non-explanation that does not address the specific gap identified in Step 2. In that case, the complaint record supports escalation. Third, Amazon acknowledges an error or a technical issue and restores the ranking. That resolution should be confirmed in writing before the matter is closed.

For escalation, the principal EU-level routes for an Amazon IT ranking complaint are:

• The European Commission – for DMA gatekeeper complaints, the Commission is the primary competent authority. DMA complaints follow a structured submission process and carry the weight of potential enforcement action against Amazon as a designated gatekeeper.
• The Italian Autorità Garante della Concorrenza e del Mercato (AGCM) – for P2B-based complaints and competition-adjacent conduct on the Italian market, the AGCM has investigative and sanctioning powers that make it a credible escalation point.
• P2B mediators – the P2B Regulation requires platforms to offer access to mediators. Amazon publishes its mediator arrangements. Mediation is faster than a regulatory investigation but requires both parties to engage in good faith.

Choosing between these routes depends on what the seller needs. A regulatory complaint achieves systemic change but operates on a regulatory timeline, which is typically measured in months to years. Mediation is faster but less powerful. A legal challenge in the Italian courts, relying on P2B or DMA direct effect, is the most resource-intensive but also the most precise.

Sellers who have already reviewed our complete guide to EU marketplace regulation for sellers will recognize this decision structure – it applies across surface-level EU complaints, not only to ranking issues.

Step 5 – Prepare and submit the escalation filing

Whether the escalation goes to the European Commission, the AGCM, or a P2B mediator, the filing document itself follows a similar structure. The difference is the level of legal precision required. A mediator submission can be relatively plain; a regulatory complaint to the Commission or the AGCM requires citations to the operative regulatory instrument, factual specificity, and a clear statement of the conduct alleged.

The filing should include:

• A chronology of events from the initial ranking change to the date of filing, citing dates and Seller Central references.
• Amazon's published ranking parameters (the P2B transparency statement), with the specific gap annotated.
• The evidence from Step 1 – screenshots, search-term data, account health records.
• The internal complaint filed in Step 3 and Amazon's response (or non-response).
• The specific legal basis: which provision of the P2B Regulation, the DMA, or other applicable instrument you assert was not met.
• The remedy sought and the reason it is proportionate to the conduct described.

A well-prepared filing does two things simultaneously. It gives the regulator or mediator what they need to assess the complaint efficiently, and it creates a formal record that can support any subsequent litigation if the regulatory channel does not produce a satisfactory outcome.

Where this step goes wrong: sellers file with the regulator but omit the internal complaint documentation, effectively asking the regulator to start from scratch. Regulators treat the internal complaint record as the foundation of the case. Its absence almost always results in a request for additional information – and delay.

For sellers who have faced parallel issues on German storefronts or other EU markets, the procedural logic is comparable; our guide on handling German marketplace suspensions addresses the analogous steps in that context.

Step 6 – Manage the commercial situation while the complaint resolves

A ranking complaint under EU rules does not pause the seller's business. Inventory is still arriving. Advertising spend is still running. The cash-flow gap created by reduced organic visibility needs to be managed in parallel with the legal and procedural process.

Several practical steps reduce the commercial damage during the resolution period:

• Increase sponsored placements for the affected ASINs to compensate for lost organic visibility, keeping the product in front of customers while the organic position is contested.
• Document the revenue impact by period – daily and weekly – in a way that creates a record of damages if litigation or a damages claim becomes relevant later.
• Avoid making changes to the affected listing that could complicate the complaint. A ranking complaint is easier to sustain when the listing itself is stable.
• Do not retaliate or attempt to file counter-complaints against competitors you suspect triggered the issue. Doing so creates a counter-record Amazon or a regulator can use against you.

The operator angle matters here. We regularly see sellers so focused on the procedural steps that they let the commercial damage compound unnecessarily. The two tracks – legal/procedural and commercial mitigation – run simultaneously.

A mid-size Italian electronics accessories seller (spring 2026) came to us after a sustained ranking drop on Amazon.it that coincided with Amazon's own branded accessories entering the same search term clusters. We assessed the gap between Amazon's disclosed ranking parameters and the observed outcome, filed a structured internal complaint through Seller Central, and prepared a parallel DMA-ground submission to the European Commission. The internal complaint produced a substantive response – the first the seller had received after several weeks of template replies – and the process of regulatory escalation was held in reserve while the internal channel continued. The seller maintained sponsored coverage throughout and recovered partial organic position within the same quarter.

Where this goes wrong: the most common failure modes

After handling EU-based seller matters across multiple storefronts, the failure points cluster around a small number of recurring errors. Naming them is useful because most are avoidable.

Filing too vaguely. The most damaging mistake is a complaint that describes the outcome ("my ranking dropped") without identifying the specific legal obligation that was not met. Amazon's internal system and regulators alike treat such complaints as general feedback, not formal challenges. They get routed accordingly.

Filing too early. Submitting a regulatory complaint before completing the internal process, and before giving Amazon a reasonable opportunity to respond, undermines the complaint's credibility and often requires the regulator to ask the seller to exhaust internal remedies first.

Conflating the P2B ground with the DMA ground. The P2B Regulation focuses on transparency obligations – did Amazon explain its ranking parameters clearly and consistently? The DMA focuses on gatekeeper conduct – is Amazon leveraging its position as a gatekeeper to disadvantage third-party sellers relative to its own services? Both can apply, but they are distinct legal arguments requiring distinct evidentiary bases. Treating them as interchangeable weakens both.

Abandoning the complaint after the first template response. Amazon's initial responses to formal complaints are often templated. The regulatory framework exists precisely because the internal system does not always produce substantive outcomes on the first attempt. A template response is not a final decision.

Changing the listing mid-complaint. Any material change to the affected ASIN during a live complaint creates ambiguity about whether the ranking outcome reflects the complained-of conduct or the seller's own modification. Freeze the listing while the complaint is active, unless not doing so would cause greater commercial harm.

Sellers who have studied the DMA self-preferencing context in detail can review our analysis of how one seller resolved a self-preferencing complaint under the DMA for a fuller view of how this plays out in practice.

The underlying myth worth addressing directly: many sellers operating under EU rules believe that once a platform makes a ranking decision, there is no meaningful recourse available to a business user. That is not accurate. The P2B Regulation and the DMA exist specifically to create procedural and substantive leverage for sellers in exactly this situation. The leverage is real, but it requires a structured approach to activate it. An unstructured complaint produces an unstructured response.

If a first internal complaint has already been sent and produced only a template reply, the next step is not to repeat the same filing. It is to assess what the reply did and did not say, build the evidentiary record to a standard suitable for regulatory escalation, and decide whether mediation, a Commission complaint, or the AGCM is the appropriate next channel. That assessment is where a practitioner adds the most value.

Related areas

• EU Marketplace Regulation – full practice overview covering DSA, DMA, P2B and EU suspension defense
• Amazon Account Reinstatement – step-by-step appeal and POA strategy for deactivated accounts

Frequently asked questions

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

The timeline varies significantly depending on the route taken. Amazon's internal complaint-handling system does not carry a fixed statutory deadline for every scenario under the P2B Regulation, and in matters we handle, substantive responses have arrived anywhere from a few days to several weeks after a well-structured filing. Escalation to P2B mediation typically takes longer – often several months for a complete cycle. A regulatory complaint to the European Commission or the AGCM operates on regulatory timelines, which are measured in months to years rather than weeks. The internal route, properly structured, remains the fastest path to a practical outcome on the Italian storefront; it is also the prerequisite for most formal escalations.

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

The principal risk is procedural: a complaint that is not grounded in a specific identified legal obligation will be treated as general feedback rather than a formal challenge. That means it gets routed differently, receives a template response, and does not create the formal record that supports escalation if needed. A second risk is evidentiary – sellers who file without first capturing dated screenshots, search-term reports, and Amazon's own disclosed ranking parameters frequently find they cannot reconstruct that evidence later. A third risk is sequencing: filing a regulatory complaint before exhausting the internal route can require starting over, adding delay. None of these errors is necessarily fatal, but correcting them after the fact takes more time and resource than doing the filing correctly once.

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

A seller can file an internal complaint without legal assistance, and for a straightforward matter where the gap between the disclosed ranking parameters and the observed outcome is clear and well-documented, that is a viable path. However, escalation – to P2B mediation, to the European Commission for a DMA-ground complaint, or to the AGCM – involves legal submissions that benefit from precise grounding in the applicable regulatory instrument. The difference between a complaint that is accepted and treated as a formal challenge and one that is returned for additional information often comes down to specificity and correct legal citation. Attorney-led drafting also creates a record that is structured for litigation if the non-litigation channels do not produce a satisfactory result.

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 regulation practice covers DSA, DMA, and P2B matters across EU storefronts including Amazon IT, and we work with appropriate local counsel for proceedings before national regulators. To discuss your situation, email info@tutamenlaw.com.

By Claire Donnelly – arbitration and disputes analyst, Tutamen

Published: August 6, 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.