| Country | Authority / Body | Address | Website or Additional Information | Phone | Notes | |
| Austria | Bundesamt zur Korruptionsprävention und Korruptionsbekämpfung | Bundesministerium für Inneres Herrengasse 7 1010 Wien Österreich | Austria | BMI-III-BAK-SPOC@bak.gv.at | +43 1 53 126-906800 | Central authority for whistleblower reports. Part of Interior Ministry. |
| Belgium | Federal Ombudsman | Rue de Louvain 48 letter box 6 1000 Brussels Belgium | Belgium | integrity@federalombudsman.be | +32 2 289 27 04 | Central reporting channel. |
| Bulgaria | Commission for Personal Data Protection | 2 Prof. Tsvetan Lazarov Blvd., Sofia, 1592 | Bulgaria | kzld@cpdp.bg | — | External reporting channel. |
| Croatia | Ombudswoman of the Republic of Croatia | Savska cesta 41/3, 10 000 Zagreb | Croatia | info@ombudsman.hr | +01 4851 855 / +01 4851 853 | Accepts written and oral reports; transcripts recorded. |
| Cyprus | General Directorate of Internal Revenue Service | Kypranoros 15, 1061 Nicosia or P.O. Box 23378, 1682 Nicosia | — | whistleblowing@dataprotection.gov.cy | +357 22 818501 | Mark physical packages confidentially. |
| Czech Republic | Ministry of Justice | — | Czech Republic | — | — | External reporting via Ministry portal. |
| Denmark | Datatilsynet Whistleblowerordningen | Carl Jacobsens Vej 35 2500 Valby | Denmark | wb@datatilsynet.dk | +45 33 19 32 02 | External and internal schemes exist. |
| Estonia | — (none established yet) | — | — | — | — | No reporting channel established yet. |
| Finland | Office of the Chancellor of Justice | Snellmaninkatu 1, Helsinki (visitng) P.O. Box 20, 00023 Government, Finland (Postal) | Finland | kirjaamo.okv@gov.fi | +358 29 516 2902 | Central external reporting channel. |
| France | Défenseur des droits | Libre réponse 71120 75342 PARIS CEDEX 0 | France | — | — | Written reports via mail. |
| Germany | Bundesamt für Justiz | Adenauerallee 99 – 103 53113 Bonn Deutschland | Germany (Bundesamt für Justiz) | — | +49 228 99410-40 / +49 228 4108-2355 / +49 228 9499 386 | Multiple authorities for different sectors. |
| BaFin | Graurheindorfer Straße 108 53117 Bonn | Germany (BaFin) | hinweisgeberstelle@bafin.de | — | — | |
| Bundeskartellamt | — | Germany (Bundeskartellamt) | — | — | — | |
| Greece | National Transparency Authority | 195, Lenorman av. and Amfiaraou str., Athens, 10442 | Greece | info@aead.gr | +30 213 2129 883 / +30 213 2129 884 | Central external channel. |
| Hungary | Labour and Occupational Health Directorate | Pf.: 17, 1358 Budapest | Hungary | munkavedelmi-foo@ngm.gov.hu | — | Central notification channel in Hungarian. |
| — | — | — | foglalkoztatas.felugyeleti-foo@ngm.gov.hu | — | — | |
| Ireland | Office of the Protected Disclosures Commissioner | 6 Earlsfort Terrace, Dublin 2, D02 W773 | Ireland | info@opdc.ie | 01 639 5650 | Hotline not recorded; secure encrypted email. |
| — | — | — | disclosures@opdc.ie | — | — | |
| Italy | Autorità Nazionale Anticorruzione (ANAC) | c/o Palazzo Sciarra, Via Minghetti, 10 00187 Roma | Italy | protocollo@pec.anticorruzione.it | +39 06 62289571 | Centralised anti-corruption authority. |
| Latvia | State Chancellery | Brīvības bulvāris 36, Rīga LV-1050, Latvia | Latvia | trauksme@mk.gov.lv | 67082910 | Central reporting channel. |
| Lithuania | Public Prosecutor’s Office | Rinktinės str. 5A, LT-01515, Vilnius, Lithuania. | Lithuania | generaline.prokuratura@prokuraturos.lt | +370 5 266 2304 | Central external channel. |
| Luxembourg | Office des Signalements | 13, rue Erasme, Centre administratif Werner L-1468 Luxembourg | Luxembourg | ods.info@mj.etat.lu | +35 247-88564 | Operating since Sep 2023; sectoral authorities listed. |
| — | — | — | alerte@concurrence.etat.lu | — | — | |
| Malta | Parliamentary Ombudsman | 11, St Paul Street Valletta VLT 1210, Malta | Malta | office@ombudsman.org.mt | +356 2248 3200 | Authority per subject; file in English/Maltese. |
| Netherlands | Multiple Authorities (ACM, AP, DNB, Huis voor Klokkenluiders) | Muzenstraat 89–91, 2511 WB The Hague | Netherlands | contact@huisvoorklokkenluiders.nl | +31 0 88 1331000 | Sector-specific external portals. |
| Poland | Commissioner for Human Rights (RPO) | al. Solidarności 77 00-090 Warszawa | Poland | biurorzecznika@brpo.gov.pl | +48 22 551 7700 | External complaints channels. |
| Portugal | National Anti-Corruption Mechanism (MENAC) | S. Crispim’s Steps No. 7, 1149 – 049 Lisboa | Portugal | geral@mec-anticorrupcao.pt | +351 210 540 950 | Multi-language online form + Teleporter. |
| Romania | National Integrity Agency (ANI) | Bulevardul Lascar Catargiu nr. 15, 010661, sector 1, Bucuresti – Romania | Romania | ani@integritate.eu | +40 372 069 869 | Allocates complaints to relevant authorities. |
| Slovakia | Whistleblower Protection Office | Námestie slobody 29 811 06 Bratislava | Slovakia | sekretariat@oznamovatelia.sk | +421 948 935 166 | Pre-implementation office. |
| Slovenia | Commission for the Prevention of Corruption (KPK) | Dunajska cesta 56 1000 Ljubljana | Slovenia | anti.korupcija@kpk-rs.si | +386 1 400-5710 | Designated for corruption; others exist by sector. |
| Spain | — (none established yet) | Agencia Valenciana Antifraude | Spain (Valenciana) | — | — | National system rolling out; regional options exist. |
| — | Oficina Antifrau de Catalunya | Spain (Catalunya) | — | — | — | |
| Sweden | Integritetsskyddsmyndigheten (IMY) | Box 8114 104 20 Stockholm | Sweden | imy@imy.se | +08-657 61 00 | Central authority; other oversight bodies apply. |
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