Online marketplace moderation is the work of checking what people post and how they behave on your site: reviewing listings before or after they go live, acting on reports, and suspending users who break the rules. It only works if it rests on clear marketplace policies: terms of service, a prohibited items policy and posting rules that say what is allowed and what happens when someone breaks them. This guide covers both halves for a classifieds site or marketplace of any size: how to set up marketplace content moderation (pre- vs post-moderation, AI screening with human decisions, user reports, moderator roles) and how to write the policies, including what the EU Digital Services Act now asks you to tell users when you remove their content.
It is part of our guide to building trust in a marketplace.
Proper moderation builds trust and reduces harmful activity. Consistent policies are what make it fair.
In short
- Use a risk-based mix: trusted sellers publish straight away, while new accounts, high-risk categories and flagged listings wait in a review queue.
- Let filters and AI hold risky listings with a reason but have a person decide, and put a report button on every listing.
- Write terms of service, a prohibited and restricted items list and posting rules, and apply the same enforcement ladder to every seller, including paying ones.
- Under the EU Digital Services Act, every hosting service needs a way to report illegal content and must send a statement of reasons when it removes a listing.
- Micro and small enterprises are exempt from the DSA complaint system and trader checks, but services with UK users must assess illegal content risk under the Online Safety Act.
Part of the guide Trust and safety for your marketplace · Part 7 of 8 Next: The Role of Customer Support in Marketplaces →
Why marketplace content moderation matters
A marketplace is a place where strangers meet to trade, often around the clock. That brings genuine buyers and sellers, and it also brings scammers, spammers, counterfeiters and people posting things you never wanted on your site. Moderation keeps the bad part small enough that genuine users stay.
- Protecting your reputation: one wave of fake listings or offensive content can make a young site look abandoned or unsafe.
- Legal compliance: in the EU, the UK and the US, platforms now have specific duties around illegal content and business sellers (see the section on the law below).
- Repeat business: a buyer who completes a safe deal comes back and tells friends; a buyer who meets a scam usually does neither.
- Community: sellers invest more effort in listings when they trust that the rules apply to everyone.
| Benefit | How moderation delivers it |
|---|---|
| Less fraud | Screening new listings and accounts stops many scam attempts before a buyer sees them |
| Better retention | Clean, relevant listings make visitors return |
| A stronger reputation | A well-run space attracts serious buyers and sellers |
| Fewer disputes | Clear rules settle many arguments before they start |
Pre-moderation vs post-moderation: choosing how listings go live
The first decision is when a listing is checked. There are two basic models, and most marketplaces mix them.
- Pre-moderation: every listing waits for approval before it is published. It catches problems before anyone sees them, but sellers wait, and the queue grows with the site.
- Post-moderation: listings go live at once and are reviewed afterwards, or when someone reports them. Sellers are happy, but a bad listing is visible until someone acts.
- Mixed (risk-based): trusted sellers publish straight away, while new accounts, high-risk categories (phones, cars, rentals, pets, tickets) or listings flagged by automated checks wait for review.
| Model | Best for | Trade-off |
|---|---|---|
| Pre-moderation | New sites, high-risk niches, small volumes | Slower publishing; needs someone checking the queue every day |
| Post-moderation | Low-risk niches, established communities | Bad listings are visible until reported or reviewed |
| Risk-based mix | Most growing marketplaces | Needs clear rules for what goes to the queue |
Other gates help too: asking sellers to confirm their email address before a listing goes live stops most throwaway accounts, and charging even a small fee to publish in some categories makes spam unprofitable.
Key components of effective moderation
Good moderation has several layers. Each one catches what the previous one missed, and genuine users should barely notice any of them.
1. Clear, public rules
Everything else depends on this. Users cannot follow rules they cannot find, and moderators cannot apply them consistently if they live only in someone's head. The policy section below explains what to write.
2. Automated screening, with people making the decisions
- Keyword and banned-word filters: block or mask words linked to prohibited items, insults or contact details used to take deals off your site.
- AI screening: modern AI checks can read a listing in context and spot scam patterns (prices far below market value, requests to pay by gift card or wire transfer, copied text) as well as breaches of your own rules written in plain language.
- Spam controls: captchas, blocking disposable email addresses and limits on listings or messages per day stop bots and bulk posting.
Automation should sort and hold, not judge. A filter that silently deletes listings will remove genuine ones and leave the seller confused. The safer pattern is that automated checks put risky listings in a queue with the reason, and a person decides. The EU Digital Services Act also expects you to tell users when automated means were involved in a decision. More on spam and scam tactics in our guide to preventing fraud, scams and spam.
3. User reports
Your users see far more listings than you do. A visible "report this listing" button on every ad, with a short list of reasons (scam, prohibited item, wrong category, offensive, illegal content), turns them into your early-warning system. Reports should land in one queue, be acknowledged, and be answered with what you decided. Community reporting is especially effective on niche and local sites, where regular users know what normal looks like.
4. Verification and reputation
- Email and phone confirmation make burner accounts more expensive.
- ID or business document checks for sellers in high-value categories, or for anyone selling as a business.
- Reviews and badges let buyers see who has a track record.
We cover this in detail in reviews, ratings and verified sellers. Any document you collect is personal data, so keep it only as long as you need it; see our guide to data privacy and security.
5. Moderator roles and consistent decisions
Once you are not the only person moderating, consistency becomes the main risk. Two moderators treating the same listing differently is how users come to see your rules as arbitrary.
- Give moderators their own role with access to listings, reports and users, but not to payments or site settings.
- Write a short internal playbook: for each common case (counterfeit, duplicate listing, off-platform payment request, offensive photo), the action to take and the message to send.
- Use the same removal message templates for everyone, including paying and premium sellers.
- Keep a record of who did what and when, so you can review decisions and answer appeals.
| Moderation tool | Automation level | Main job | Example |
|---|---|---|---|
| Keyword and banned-word filters | High | Blocking known bad terms | Masking phone numbers in listing text |
| AI screening | High | Spotting scam patterns and rule breaches | Holding a listing that asks for gift-card payment |
| Spam controls and blocklists | High | Stopping bots and repeat offenders | Blocking a disposable email domain |
| User reports | Low | Catching what slips through | A buyer flags a counterfeit |
| Human moderators | Low | Nuanced decisions and appeals | Deciding whether a borderline item breaks the rules |
Tip: combine automated filters with human review. Automation gives you speed; people give you accuracy and fairness.
How to write marketplace policies
Marketplace policies are the rules everything above enforces. They define who can use the site, what can be listed, how people must behave and what happens when they don't. Treat them as living documents: review them at least once a year, and whenever you add categories, payments or a new country.
Terms of service
Your terms are the contract with users. For a classifieds site or marketplace they should cover:
- Eligibility: minimum age (often 18), any countries you don't serve and why, and whether businesses need to register as such.
- Your role: whether you are only a venue where buyers and sellers meet, or you take part in payment or delivery. Be honest about it; a disclaimer cannot undo legal duties.
- Fees: listing fees, featured placements, subscriptions or commissions, stated up front.
- Content and moderation: the grounds on which you may remove listings or restrict accounts, how moderation works (including any automated checks and human review), and how users can complain. Under the EU DSA this is no longer optional (see below).
- Disputes, refunds and liability: what you do when a deal goes wrong. See our guides to resolving marketplace disputes and refunds and returns.
- Personal data: link to your privacy policy rather than repeating it.
Prohibited items policy
A prohibited items policy lists what may never be listed, and what may be listed only under conditions. Splitting it into two lists makes it easier to follow:
- Prohibited: illegal goods and services (drugs, stolen goods, counterfeits, weapons where they are illegal), recalled products, adult content if you don't allow it, and anything against your own values.
- Restricted: items allowed with conditions, for example vehicles only with the registration details, pets only from registered breeders, alcohol or knives only where local law allows and with age checks, tickets only at face value.
Keep each entry short and concrete, add one example of what is and isn't allowed, and link to it from the posting form. Large marketplaces do the same: eBay, for example, publishes an alphabetical list of prohibited and restricted item policies, each with its own page. The rules for what is legal vary by country and category, so check them for the markets you serve.
Posting rules
Posting rules cover how a listing must look: one item per listing, the right category, real photos of the item, an honest price, no duplicate or repeated listings, no contact details in images if you don't allow them, and no requests to pay outside the methods you approve. They also cover behaviour: no harassment, no spam messages, no fake reviews.
Enforcement
Say in advance what happens when someone breaks the rules, and follow it. A typical ladder:
- Edit request or warning for a minor, first breach (wrong category, missing photo).
- Listing removed, with the reason and how to appeal.
- Temporary posting limit or suspension for repeated breaches.
- Account closed for fraud, illegal items or serious abuse, and blocked from signing up again.
Apply the same ladder to every seller, including paying ones. If premium sellers can buy their way around the rules, the rules stop meaning anything.
Template
Moderation and content-removal policy
Publish this so users know how listings are checked, how to report one and how to appeal a decision; fill in your timings and contact points.
A starting point, not legal advice: have it checked for your country.
| Policy element | Purpose | Example |
|---|---|---|
| Eligibility | Defines who can take part | Minimum age of 18 |
| Prohibited and restricted items | Prevents illegal or harmful listings | No weapons; pets only from registered breeders |
| Posting rules | Keeps listings useful and honest | One item per listing, real photos |
| Fees and payments | Avoids surprises | Featured listing price shown before paying |
| Moderation and appeals | Explains how decisions are made and challenged | Removal email with the rule broken and an appeal link |
| Disputes and liability | Sets expectations when a deal fails | How to report a seller who never delivered |
Common problems with marketplace policies, and fixes
| Problem | What goes wrong | Fix |
|---|---|---|
| Users in several countries | Rules that are legal in one market break the law in another | Get local legal advice for each market you target and add country-specific clauses |
| Rules nobody reads | Long legal text puts people off signing up and is ignored | Put a short plain-language summary on top, and show the key rules next to the posting form |
| Too many listings to check | Breaches pile up | Automated screening plus user reports, with people deciding the flagged cases |
| Inconsistent enforcement | Users see decisions as arbitrary | An internal playbook and the same message templates for everyone |
| Several languages | Rules are misunderstood | Translate the policies and have native speakers moderate those languages |
Read the complaints and reports you receive every month: they show which rules are unclear and where new scams are appearing.
Moderation in 2026: what the numbers show and what the law requires
Two things have changed in the last few years. The largest marketplaces now publish figures on what proactive screening achieves. And in the EU, the UK and the US, parts of moderation and seller checks are legal duties, some of them for small sites too.
What the biggest marketplace reports. Amazon's Trustworthy Shopping Experience Report (published April 2026, covering 2025) says its proactive controls blocked more than 99.9% of suspected infringing listings before a brand owner had to find and report them. It seized and disposed of more than 15 million counterfeit products worldwide in 2025 and proactively blocked "hundreds of millions" of suspected fake reviews. Every new seller must pass verification before selling. You do not need Amazon's budget to copy the order of operations: check who is posting before their first listing goes live, screen content at upload, and rely on user reports for whatever slips through.
The rules that apply to marketplaces, as of October 2026 (a summary, not legal advice; check with a lawyer for the markets you serve):
| Rule | In force since | What it means for a classifieds site or marketplace |
|---|---|---|
| EU Digital Services Act, Art. 14 (terms and conditions) | 17 Feb 2024 | Your terms must state any restrictions on what users can post, including your moderation policies, procedures and tools (automated decision-making and human review), in clear language. You must apply them in a diligent, objective and proportionate way, and tell users about significant changes. |
| DSA Art. 16 (notice and action) | 17 Feb 2024 | Every hosting service, whatever its size, needs an easy electronic way for anyone to report illegal content. You must confirm receipt, decide in a timely, diligent, non-arbitrary and objective way, tell the reporter what you decided and say whether automated means were used. |
| DSA Art. 17 (statement of reasons) | 17 Feb 2024 | When you remove a listing, restrict its visibility, or suspend or close an account because it is illegal or breaks your terms, you must tell the user why, without undue delay (see below). |
| DSA Art. 20 and Art. 24 (complaints and transparency database) | 17 Feb 2024 | Online platforms must offer a free electronic complaint system for at least six months after a decision, with complaints decided under the supervision of qualified staff, not by automation alone, and must send their statements of reasons to the Commission's DSA Transparency Database. Micro and small enterprises are exempt (Art. 19) unless designated very large. |
| DSA Art. 30 (traceability of traders) | 17 Feb 2024 | Marketplaces where consumers buy from traders must collect name, address, phone, email, an ID document, payment account details, trade register number (if registered) and a self-certification of compliance before the trader can sell, and make best efforts to check them. Art. 29 exempts micro and small enterprises unless designated very large. |
| UK Online Safety Act, illegal content duties | 17 Mar 2025 | Services that let users post content or interact must assess the risk of illegal content and have systems to remove it when they become aware of it, including when users flag it. Duties are proportionate to size and risk. Ofcom can fine up to GBP 18 million or 10% of qualifying worldwide revenue, whichever is greater (GOV.UK explainer). |
| US INFORM Consumers Act | 27 Jun 2023 | Applies to "high-volume" third-party sellers of new or unused consumer products (200+ sales and $5,000+ in gross revenue in any continuous 12 months within the last 24). The marketplace must collect bank, tax ID and contact details within 10 days, verify them, and have sellers certify them every year; sellers with $20,000+ a year must have their name and address disclosed to buyers; and listing pages need a phone and electronic way to report suspicious activity. The FTC lists civil penalties of $53,088 per violation (unchanged for 2026). |
| UK reporting rules for digital platforms | In force (see HMRC guidance) | UK platforms must report what their sellers earn. Sellers of goods with fewer than 30 sales and no more than EUR 2,000 (about GBP 1,700) a year are not reported; that exception does not cover services or rentals. Your seller terms should say you collect this data and why. |
The European Commission can fine providers up to 6% of global annual turnover for breaching the DSA, according to its DSA questions and answers.
What a statement of reasons must contain
Under DSA Article 17, the message you send a user when you act against their listing or account must cover:
- what you did (removed, hid, demoted, suspended) and, where relevant, for how long and where;
- the facts you relied on, including whether it came from a user report;
- whether automated means were used to detect it or decide;
- the law or the rule in your terms that was broken, and why the content breaks it;
- how the user can challenge the decision.
It must be in a form the user can keep (an email works) and in a language they understand. For manifestly illegal content you may skip the full statement, but you still have to tell the user what you decided. A good set of templates, one per common reason, covers most cases and also keeps your moderators consistent.
Template
Message when you remove or reject an ad
Send this to a user whose listing you rejected or removed; pick the reason that applies, delete the others, and keep the tone helpful so they fix it and post again.
A practical minimum for a small marketplace
- Write the moderation section of your terms: what you remove, how you decide (including automated checks) and how to appeal.
- Publish a prohibited and restricted items list and short posting rules, and link them from the posting form.
- Choose your publishing model: approval for new accounts and high-risk categories, plus email confirmation for everyone.
- Add banned-word filters, captcha and limits on listings and messages per day.
- Put a visible "report this listing" button on every ad, and acknowledge each report.
- Send a standard removal message that names the rule broken and how to appeal (this covers most of DSA Art. 17).
- Give moderators their own role, a playbook and shared templates, and keep a record of decisions.
- If you have UK users, write a short illegal content risk assessment and review it when you add categories.
- Verify business sellers before they sell to consumers once you outgrow the EU small-enterprise exemption, or once US sellers reach INFORM's high-volume thresholds.
This is a starting point, not legal advice. Have a lawyer check your terms for each market you serve. Good moderation also depends on answering users quickly; see our guide to customer support in marketplaces.
Moderating your marketplace with Yclas
If you run your classifieds site or marketplace on Yclas, most of the tools above are built in:
- Publishing control: you choose whether listings go live straight away, after your approval, after the seller confirms their email, or after payment.
- AI check (Starter, Professional and Marketplace plans): screens every new listing for scam patterns and for your own rules written in plain language, and holds risky ones in a moderation queue with the reason. It never deletes anything; you decide.
- Reports and statements of reasons: a Report button on every listing with DSA reasons, a reports queue, and a statement of reasons emailed to the seller when you act.
- Spam protection: captcha (Cloudflare Turnstile, Google reCAPTCHA or built-in), disposable email blocking, banned words blocked or masked, Akismet, blocked emails and domains, a black list, and limits on listings per day, contact messages and login attempts.
- Message warnings: buyers and sellers are warned when a message asks for gift cards, wire transfers or one-time codes.
- Sellers: seller verification with ID or business documents (deleted once decided), badges, seller reviews, and business account approval with trader details for the DSA.
- Team and records: moderator and translator roles, two-step login, and an audit log nobody can edit or delete.
See all of it on our trust and safety page, or try it free for 15 days.
Prohibited items and posting rules template
Start from this list, remove what doesn't apply to your categories and add your own. Keep it on one page and link it from the posting form.
Template: prohibited items and posting rules
What you can't post on [Site name]
We remove listings that break these rules and may limit or close the accounts that post them. If you see one, use the Report button on the listing.
Never allowed
- Anything illegal where you or the buyer are, or stolen goods.
- Weapons, ammunition and explosives [except: list any exceptions you allow, such as licensed dealers].
- Drugs, medicines that need a prescription, and drug equipment.
- Counterfeits and replicas, and copied software, films or music.
- Animals [or: animals, except rehoming by registered breeders and shelters].
- Adult content and services.
- Personal documents, accounts, gift cards and vouchers sold for less than their value.
- Recalled or unsafe products.
- [Your own: for example, live plants, tobacco and vapes, alcohol.]
Posting rules
- One item or service per listing, in the right category, with a real price.
- Your own photos of the item you are selling. No stock photos for used items.
- Describe the condition honestly, including faults.
- No contact details, links or payment requests in the photos or the title.
- Don't post the same item more than once. Renew it instead.
- Business sellers must say they are a business and complete their trader details.
- Never ask buyers for gift cards, wire transfers, crypto or one-time codes.
What happens if a listing breaks the rules
We remove or hide it and tell you why, with the rule it broke. Repeated or serious breaches lead to [a temporary block / closing the account]. If you think we got it wrong, reply to our message within [6 months] and a person will review it.
Last updated: [date].
Adapt it to your site, your categories and the law where you and your users are. This is a starting point, not legal advice.
Frequently asked questions
What is online marketplace moderation?
It is checking listings, messages, reviews and user behaviour against your rules and the law, and acting when something breaks them: holding, editing or removing a listing, warning or suspending a user, and answering reports.
Should I approve every listing before it goes live?
On a new or high-risk site, approving listings from new accounts is a good default. As you grow, move to a risk-based mix: trusted sellers publish straight away, and automated checks and reports send the rest to a queue.
Can AI moderate my marketplace on its own?
It shouldn't. AI is good at sorting and flagging at speed, but it makes mistakes on borderline cases. Let it hold risky listings with a reason and have a person decide. Under the DSA you must also tell users when automated means were used, and online platforms above small-enterprise size must have complaints decided under human supervision.
What should a prohibited items policy include?
Two lists: items that are never allowed (illegal goods, counterfeits, stolen goods, recalled products) and items allowed only under conditions (vehicles, pets, alcohol, tickets and so on), each with a short example. Link it from the posting form and update it when you add categories.
Does the Digital Services Act apply to a small classifieds site?
Partly. Since 17 February 2024, every hosting service with EU users must have clear terms on moderation, a way to report illegal content, and a statement of reasons when it removes content or restricts accounts. Micro and small enterprises are exempt from the extra duties for online platforms and marketplaces, such as the complaint system and trader checks, unless they are designated very large. This is not legal advice.
How often should I update my marketplace policies?
Review them at least once a year, and whenever you add categories, payments or a new country. Tell users about significant changes; the DSA requires it.
How do I keep moderation consistent across a team?
Give moderators a written playbook, shared message templates and their own role, apply the same rules to paying and free users, and keep a record of decisions so you can review them and handle appeals.
Conclusion
Marketplace moderation works when three things fit together: clear, public policies; layers of checks where automation flags and people decide; and consistent, explained decisions. That is also, broadly, what the DSA and the UK Online Safety Act now ask of platforms. Start with the practical minimum above, read your reports every month, and tighten the rules where the problems show up.
