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UDRP Providers Compared: WIPO, Forum (NAF), ADNDRC, and the Czech Arbitration Court for a Domain Dispute in 2026
A UDRP provider is one of the dispute-resolution organisations ICANN has approved to hear domain-name complaints under the Uniform Domain-Name Dispute-Resolution Policy. There are five of them, and the one a case lands at shapes the fee, the page limits, the panelists, and how fast a decision arrives.
The search behind “UDRP providers: WIPO, NAF, ADR, CAC” wants the four names that dominate the field set side by side: the World Intellectual Property Organization, the Forum (formerly the National Arbitration Forum), the Asian Domain Name Dispute Resolution Centre, and the Czech Arbitration Court that runs the ADR platform. This guide compares all of them against ICANN’s own list, the published fee schedules, and the 2026 reforms.
It also adds the angle every legal explainer skips. These providers exist because a domain was registered in a way a trademark owner can challenge. The cleanest way to never sit at one of their tables is to acquire a name with no trademark conflict and a clean registration history in the first place. SEO Domains operates the curated marketplace where aged and expired domains are screened on exactly those signals before they are listed.
What a UDRP provider is, and the five approved by ICANN
A UDRP provider is an ICANN-approved dispute-resolution organisation authorised to administer complaints under the Uniform Domain-Name Dispute-Resolution Policy. Five are currently approved: WIPO, the Forum (formerly the National Arbitration Forum), the Asian Domain Name Dispute Resolution Centre, the Czech Arbitration Court, and the Arab Center for Dispute Resolution. Each applies the same policy but runs it under its own supplemental rules and fee schedule.
The policy is uniform, the administration is not
The UDRP itself is a single ICANN policy that every accredited registrar incorporates into its registration agreement. It gives a trademark owner a fast, arbitration-style route to win the transfer or cancellation of a domain without going to court. The policy is identical across providers. What differs is who administers the case, under which supplemental rules, at which fee, and with which roster of panelists.
That distinction is the whole reason this comparison exists. A complainant filing a UDRP gets to choose the provider. A respondent does not. So the provider that hears a dispute is a decision made by the trademark owner, and a domain owner inherits it.
The five providers ICANN currently lists
ICANN maintains the authoritative list of approved providers on its website. As of 2026 the approved providers, with their approval effective dates where ICANN records them, are below. Two early providers, eResolution and the CPR Institute, were on the original roster and are no longer active UDRP providers.
| Provider | Abbreviation | Approved (effective) | Base |
|---|---|---|---|
| World Intellectual Property Organization | WIPO | 1 December 1999 | Geneva, Switzerland |
| The Forum (formerly National Arbitration Forum) | Forum / NAF | 23 December 1999 | Minneapolis, United States |
| Asian Domain Name Dispute Resolution Centre | ADNDRC | 28 February 2002 | Beijing, Hong Kong, Seoul, Kuala Lumpur |
| Czech Arbitration Court, Arbitration Center for Internet Disputes | CAC / ADR.eu | 2008 | Prague, Czech Republic |
| Arab Center for Dispute Resolution | ACDR | 2013 | Amman, Jordan |
For context on how a complaint moves through any of these providers from start to decision, the procedure is documented in the UDRP Proceedings hub, and the structure of a complaint itself in the guide on Filing a UDRP complaint: procedure.
WIPO: the dominant provider
The World Intellectual Property Organization is the busiest UDRP provider, handling roughly 53 percent of all complaints. Its single-panel fee is USD 1,500 for one to five domains, its panelist roster is the largest and the widest-reaching internationally, and in 2026 it added an expedited service that commits to a one-month decision for single-panel cases.
Scale, fees, and panelists
WIPO administered the first UDRP case in 1999 and has dominated the field since. By GigaLaw panelist Doug Isenberg’s accounting, WIPO and the Forum together take about 97 percent of all complaints, with WIPO at 53 percent and the Forum at 44 percent. WIPO is based in Geneva and its panelist list is drawn largely from trademark and domain-name attorneys in private practice, spanning a broader set of countries than any other provider’s roster.
WIPO’s published Schedule of Fees sets the cost of a complaint by the number of domains and the panel size. A single-member panel covering one to five domains is USD 1,500, of which USD 1,000 goes to the panelist and USD 500 to the WIPO Center.
| Domains in dispute | Single-member panel | Three-member panel |
|---|---|---|
| 1 to 5 | USD 1,500 | USD 4,000 |
| 6 to 10 | USD 2,000 | USD 5,000 |
| 11 or more | Determined with the WIPO Center | Determined with the WIPO Center |
The 2026 expedited service
On 9 March 2026 WIPO updated its fee schedule and introduced new services. The headline change is Expedited Case Processing, a priority track that commits to delivering a decision in one month from start to finish for single-panel cases, run by a dedicated team and a special panel roster. WIPO also reduced its early-termination fee, so a complaint withdrawn before formal notification now retains only USD 100 in administrative processing for a one-to-five-domain case instead of forfeiting the larger sum.
Forum, formerly the National Arbitration Forum (NAF)
The Forum, long known as the National Arbitration Forum, is the second-busiest UDRP provider at roughly 44 percent of cases and the dominant United States provider. Its simple filing fee is USD 1,300, below WIPO’s, but it charges separately for additional submissions and extensions, and its panelist roster is weighted toward retired judges in place of trademark attorneys.
The US provider, and the rebrand
The National Arbitration Forum, headquartered in Minneapolis, rebranded to “the Forum” and operates at adrforum.com. It is the provider with exclusive jurisdiction over .us disputes and runs an online filing platform that transmits complaints and annexes electronically with secure online payment. Where WIPO leans on practising trademark attorneys, the Forum’s panelist list carries a notable share of retired judges, a composition difference Isenberg of GigaLaw flags as one of the ten distinctions between the two.
The fee and procedure differences against WIPO
The Forum’s headline filing fee for a simple complaint of one to five domains with a single panelist is USD 1,300, lower than WIPO’s USD 1,500. The gap narrows once the add-on fees are counted. Isenberg’s comparison records that the Forum charges USD 400 for an additional submission, where WIPO charges nothing, and USD 100 to request an extension, where WIPO charges nothing. WIPO refunds roughly USD 1,000 of its filing fee on early termination; the Forum provides no refund.
WIPO
USD 1,500 single-panel filing fee, no charge for additional submissions or extensions, roughly USD 1,000 refunded on early termination, 5,000-word complaint limit, panelists drawn from trademark attorneys across a wide range of countries, and a published Jurisprudential Overview describing consensus positions.
Forum (NAF)
USD 1,300 single-panel filing fee, USD 400 per additional submission, USD 100 per extension, no refund, a 15-page complaint limit, a panelist roster weighted toward retired judges, exclusive .us jurisdiction, and faster decision publication.
One widely cited Isenberg data point is decision-publication speed. In his review, the Forum published decisions an average of 3.3 days after issue, against WIPO’s 11.2 days. The Forum also measures complaint length in pages, capping it at 15, while WIPO measures it in words, capping it at 5,000. The Forum is the only provider that lets a complainant file an additional submission within five days of the respondent’s reply deadline.
ADNDRC and ACDR: the regional providers
The Asian Domain Name Dispute Resolution Centre and the Arab Center for Dispute Resolution are the regional UDRP providers. ADNDRC operates from Beijing, Hong Kong, Seoul, and Kuala Lumpur, applies a 3,000-word complaint limit, and is more flexible on language where a registration agreement is in Chinese. ACDR, based in Amman, serves the Arab world and permits consolidation of multiple claimants.
ADNDRC: the Asian centre
The Asian Domain Name Dispute Resolution Centre was approved in 2002 and runs through four offices: Beijing, Hong Kong, Seoul, and Kuala Lumpur. It is the natural choice where a registrant is in the Asia-Pacific region or where the registration agreement is in an Asian language. Per the comparison published by the law firm Dreyfus, ADNDRC is more likely than the Forum to accommodate a change in the language of proceedings, particularly with Chinese-language registration agreements, and it caps complaints at 3,000 words against the 5,000-word ceiling at WIPO and the Czech Arbitration Court. ADNDRC also administers disputes for five named ccTLDs: .cc, .nu, .pw, .tv, and .ws.
ACDR: the Arab centre
The Arab Center for Dispute Resolution, based in Amman, Jordan, was approved as a UDRP provider in 2013. It serves complainants and respondents in the Arab world and, per the Dreyfus comparison, permits consolidation of multiple claimants in a single proceeding. It is the smallest of the five by case volume, and like every provider it applies the same ICANN policy and three-element test.
The Czech Arbitration Court: ADR and CAC explained
“ADR” and “CAC” both refer to the same provider: the Czech Arbitration Court’s Arbitration Center for Internet Disputes, which runs an online dispute-resolution platform branded ADR.eu. It is the provider for .eu domain disputes and also hears UDRP cases for generic top-level domains, distinguished by a fully online platform and group-action handling.
Why the query lists ADR and CAC separately
The search “WIPO, NAF, ADR, CAC” treats ADR and CAC as if they were two providers. They are one. CAC is the Czech Arbitration Court. ADR.eu is the name of its online platform, the same way the Forum runs adrforum.com. A searcher who sees “ADR” in one source and “CAC” in another is looking at a single Prague-based provider under two labels.
The .eu specialist with an online platform
The Czech Arbitration Court is the designated provider for .eu domain disputes and also administers UDRP cases for generic top-level domains. Its defining feature is a fully online platform: complaints, responses, and decisions move through the ADR.eu system. Per the Dreyfus comparison, CAC permits a form of group action, letting a complainant bring similar legal arguments against multiple domains held by the same entity in one proceeding, which can lower the per-domain cost for a large dispute.
The provider comparison: WIPO vs Forum vs ADNDRC vs CAC
WIPO is the largest and the widest-reaching internationally, with the deepest panelist bench and a new expedited track. The Forum is the cheaper US provider with retired-judge panelists and fast decisions. ADNDRC is the Asian specialist with tighter word limits and language flexibility. The Czech Arbitration Court is the online-platform .eu provider with group-action handling. The table below sets all four side by side.
This is the consolidated view the query asks for and that no single competitor page provides. GigaLaw compares WIPO against the Forum only; ICANN publishes a bare list; the Dreyfus comparison is the widest but dates to 2014. The table below merges those sources and the current 2026 fee schedules into one reference.
| Factor | WIPO | Forum (NAF) | ADNDRC | Czech Arbitration Court (ADR / CAC) |
|---|---|---|---|---|
| Base | Geneva | Minneapolis | Beijing, Hong Kong, Seoul, Kuala Lumpur | Prague |
| Share of cases | About 53 percent | About 44 percent | Regional volume | Regional volume, .eu specialist |
| Single-panel fee (1 to 5 domains) | USD 1,500 | USD 1,300 | Provider schedule | Provider schedule |
| Complaint length limit | 5,000 words | 15 pages | 3,000 words | Online platform format |
| Panelist composition | Trademark attorneys, many countries | Many retired judges | Regional panelists | Regional panelists |
| Distinctive feature | Largest roster, Jurisprudential Overview, 2026 expedited track | Lower fee, .us jurisdiction, fast decisions | Asian-language flexibility, ccTLD coverage | Fully online ADR.eu platform, .eu, group actions |
| Best fit | International disputes, complainants wanting precedent depth | US-based parties, .us domains, cost-sensitive filings | Asia-Pacific registrants and registration agreements | .eu disputes and multi-domain group actions |
How a provider is chosen, and which one a domain owner faces
The complainant chooses the provider when filing; the respondent inherits it. A complainant weighs fee, panelist composition, language, regional fit, and decision speed. A domain owner cannot pick the venue, so the practical question for a registrant is not which provider to choose but how to read a complaint, respond on time, and prove a legitimate interest under the same policy whichever provider applies it.
The complainant’s decision, step by step
A trademark owner filing a UDRP runs through a short selection sequence. The provider choice is made once, at filing, and binds the whole case.
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Confirm the domain is covered
A generic top-level domain can go to any provider. Certain extensions are tied to one: .us disputes go to the Forum, .eu disputes go to the Czech Arbitration Court, and a set of ccTLDs sits with WIPO or ADNDRC. The extension narrows the field first.
The trap: filing a ccTLD dispute at a provider that does not administer that extension wastes the fee and the time. Check the provider’s jurisdiction before paying.
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Weigh fee against panelist fit
The Forum’s USD 1,300 single-panel fee undercuts WIPO’s USD 1,500, but WIPO’s larger international roster and published Jurisprudential Overview suit complex or cross-border disputes. A complainant balances the cost against the depth of precedent they want behind the decision.
The trap: choosing on headline fee alone. The Forum’s USD 400 additional-submission and USD 100 extension fees can erase the saving in a contested case.
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Match the provider to language and region
Where the registrant is in Asia or the agreement is in Chinese, ADNDRC handles language better. For an Arab-world party, ACDR fits. For a fully online .eu case, the Czech Arbitration Court’s platform is built for it.
The trap: ignoring the language of the registration agreement. The wrong venue can force a translation fight that delays the case.
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File, then await the response window
Once filed, the provider notifies the registrant, who has 20 days to respond. WIPO’s 2026 expedited track can compress the whole timeline to roughly a month for single-panel cases.
The trap: for a respondent, missing the 20-day window. A default does not guarantee a loss, but it forfeits the chance to prove a legitimate interest.
Which provider a domain owner is likely to face
For a registrant, the odds are simple. Because WIPO and the Forum take roughly 97 percent of complaints between them, an owner challenged over a generic top-level domain will almost certainly answer at one of those two. The substance of the response does not change with the venue. Every provider applies the same three-element test: that the domain is identical or confusingly similar to a trademark, that the registrant lacks rights or legitimate interests, and that the domain was registered and used in bad faith.
The defenses are also uniform. A registrant proves a legitimate interest the same way at any provider, and the playbook for doing so is set out in the guide on Defending against a UDRP. The cost of mounting that defense, and of the proceeding itself, is broken down in Cost of a UDRP proceeding. The point that matters for a buyer is upstream of all of it: a name with no trademark conflict and a clean registration history rarely draws a complaint at any provider in the first place.
UDRP provider frequently asked questions
The five questions domain owners and complainants raise when they compare UDRP providers, answered against ICANN’s list, the published fee schedules, and the 2026 reforms.
Q1What is the count of UDRP providers?
Five are currently approved by ICANN: the World Intellectual Property Organization (WIPO), the Forum (formerly the National Arbitration Forum), the Asian Domain Name Dispute Resolution Centre (ADNDRC), the Czech Arbitration Court (which runs the ADR.eu platform), and the Arab Center for Dispute Resolution (ACDR). A sixth, the Canadian International Internet Dispute Resolution Centre, has also appeared on ICANN listings. Two early providers, eResolution and the CPR Institute, are no longer active.
Q2Are ADR and CAC the same provider?
Yes. Both names refer to the Czech Arbitration Court’s Arbitration Center for Internet Disputes. CAC is the institution; ADR.eu is the name of its online platform. A query that lists “ADR” and “CAC” as separate providers is double-counting one Prague-based provider.
Q3Which UDRP provider is cheapest?
The Forum’s headline single-panel filing fee of USD 1,300 for one to five domains is lower than WIPO’s USD 1,500. The saving narrows in a contested case, because the Forum charges USD 400 for an additional submission and USD 100 for an extension, where WIPO charges neither, and WIPO refunds roughly USD 1,000 on early termination where the Forum refunds nothing.
Q4Can a domain owner choose which provider hears their case?
No. The complainant selects the provider when filing, and the respondent inherits that choice. Because WIPO and the Forum handle roughly 97 percent of complaints between them, a challenged owner is almost certain to answer at one of those two. The same three-element test applies at every provider, so the defense does not change with the venue.
Q5What changed at WIPO in 2026?
On 9 March 2026 WIPO updated its fee schedule and added an Expedited Case Processing service that commits to a one-month decision for single-panel cases, run by a dedicated team and special panel roster. WIPO also cut its early-termination fee, retaining only USD 100 in administrative processing for a one-to-five-domain complaint withdrawn before formal notification.
Where provider choice starts: a domain you never have to defend
Every UDRP provider exists to resolve disputes over names registered in a way a trademark owner can challenge. The reliable way to stay off every provider’s docket is to acquire a domain with no trademark conflict and a clean registration history. That diligence is a sourcing decision, made before purchase. SEO Domains operates the curated marketplace where aged and expired domains are screened on exactly those signals before they are listed.
The dispute is downstream of the acquisition
Comparing providers is useful once a dispute exists. The better question for a domain buyer is how to avoid one. A UDRP complaint only succeeds where the three elements line up: a confusingly similar trademark, no legitimate interest, and bad-faith registration and use. A name acquired clean, with no infringing match and a real prior-use history, fails the complainant’s case before it starts. The provider comparison becomes academic, because no complaint is ever filed.
The screen that keeps a name off the docket
The diligence that prevents a UDRP is the same diligence that makes an aged or expired domain a sound asset. It reads the registration history through RDAP, the Registration Data Access Protocol that replaced WHOIS as the standard ICANN lookup on 28 January 2025, and it screens the name against trademark records and prior disputes.
- A trademark screen against the relevant registers, so the name carries no confusingly similar mark.
- An RDAP registration-history read, confirming real prior use and no pattern of abusive registration.
- A prior-dispute check, confirming the name has not already lost or settled a UDRP.
- A backlink and content-history review, so the inherited profile is genuine rather than spam-built.
A domain that passes these is one a complainant has no case against at any of the five providers. A domain that fails them is a liability the moment it is registered, whichever provider a trademark owner happens to choose.
| Check | Unscreened name (UDRP exposure) | Screened name (no case to answer) |
|---|---|---|
| Trademark match | Confusingly similar to a live mark | No infringing match on the registers |
| Registration history | Unknown or abusive prior use | Real prior use, read through RDAP |
| Prior disputes | Already lost or settled a UDRP | No adverse dispute on record |
| Inherited profile | Spam-built or toxic | Genuine, editorially earned |
| Outcome if challenged | Three-element test can be met | Complaint fails at element one |
Browse aged and expired domains screened before they are listed
The demand behind comparing UDRP providers is, at root, a wish to never need one. That outcome is a sourcing decision. SEO Domains operates the curated marketplace where aged and expired domains are screened across their registration history, trademark exposure, and backlink profile before they are listed and priced, so a buyer starts from a name no complainant has standing to challenge.
