This document has not yet been reviewed by a lawyer and is not in force. Passages marked [[ ERGÄNZEN: … ]] are to be completed by the operator or by the lawyer.
You do not want to be listed in the company database? You can object to the processing at any time (Art. 21 GDPR) – using the form on the Objection page or by email to info@b2bkartei.de. Details in section 10.
b2bkartei.de compiles company databases and supplies exports from them to businesses (German company database, exports per request; Czech company database; other countries on request). Information about businesses is only personal data if it relates to a natural person. This information is therefore addressed to:
For visitors to this website, prospective customers and customers, the privacy policy applies.
Martin Adamec (sole trader)
Mírová 1541, 516 01 Rychnov nad Kněžnou, Czech Republic
Company identification number (IČO): 19552319
Email: info@b2bkartei.de · Phone: +420 720 950 900
On the data protection officer, see the privacy policy, section 13.
For each record, we process the following where available in the sources:
We do not process special categories of personal data (Art. 9 GDPR) or data relating to criminal convictions (Art. 10 GDPR). [[ ERGÄNZEN: bestätigen, dass Geburtsdaten und Wohnanschriften von Vertretungsberechtigten aus Registern nicht übernommen werden ]]
All data comes from publicly accessible sources. A detailed description is on the page Data sources and methodology.
The sources of the German dataset have not yet been finalised; they are being legally reviewed before any data is collected. Possible sources are details that businesses publish themselves (legal notice details under § 5 DDG, company websites). The commercial register and the company register can be inspected entry by entry under § 9 HGB; we do not plan any bulk transfer of register data without a legal basis. [[ ERGÄNZEN: Quellen des deutschen Datensatzes nach Abschluss der rechtlichen Prüfung abschließend nennen ]]
Note for the legal review (remove before publication): § 9(1) HGB permits inspection of the commercial register “for information purposes by means of individual retrievals”; this applies accordingly to the company register (§ 9(6) HGB), and § 52 HRV requires retrieval individually per register sheet. The register portal’s terms of use prohibit systematic retrievals for building parallel full or partial registers and limit retrievals to 60 per hour; the company register’s terms of use contain a corresponding prohibition. It needs to be clarified from which sources register details (register court, register number, authorised representatives) can lawfully be obtained and whether legal notice details may be collected on a large scale. Section 3 and this section must then be adjusted accordingly.
On request, we will tell you which source the details in your record come from.
We process the data to build and maintain company databases and to provide businesses with exports from them for business purposes (B2B), in particular for initiating business contacts by phone or post, maintaining customer data (CRM) and market analysis. We do not offer the data for email marketing; our customers are contractually obliged to comply with § 7 UWG (§ 7 of the Terms).
We do not create personality profiles, do not evaluate personal characteristics and do not take automated decisions within the meaning of Art. 22 GDPR.
The legal basis is Art. 6(1)(f) GDPR. Our legitimate interest and that of our customers lies in providing and using information about businesses for business-to-business dealings; recital 47 GDPR recognises that direct marketing can also be a legitimate interest.
When balancing this against your interests, we take into account in particular:
[[ ERGÄNZEN: schriftliche Interessenabwägung dokumentieren; Hinweis, ob sie auf Anfrage zur Verfügung gestellt wird ]]
If you have received advertising from a business, that business is responsible for contacting you; please (also) address your objection to the advertising to that business.
We process the data within the European Union. [[ ERGÄNZEN: ob Exporte an Kunden außerhalb der EU/des EWR (z. B. Schweiz, Vereinigtes Königreich) geliefert werden; ggf. Angemessenheitsbeschluss oder Garantie nach Art. 46 DSGVO ]]
We store a record as long as the business is listed as active in the sources and the record is necessary for the stated purpose. If a business is no longer listed as active in the sources, we delete the personal details [[ ERGÄNZEN: Löschfrist nach Wegfall in der Quelle ]].
After a justified objection, we delete the record. To prevent the data from being added again during a later update from the sources, we store on a suppression list only the features required for this purpose (for example register number, phone number or email address) [[ ERGÄNZEN: Speicherdauer der Sperrliste ]].
Right to object (Art. 21 GDPR): you can object to the processing of your data at any time. Where the processing serves direct marketing, you do not have to give reasons for your objection, and we will no longer process your data for this purpose afterwards (Art. 21(2) and (3) GDPR). Otherwise, you can object on grounds relating to your particular situation; we will then no longer process your data unless we can demonstrate compelling legitimate grounds that override your interests, rights and freedoms, or the processing serves the establishment, exercise or defence of legal claims (Art. 21(1) GDPR).
The easiest way is the form on the Objection page; informally also by email to info@b2bkartei.de or by post to the address in section 2.
In addition, subject to the statutory requirements, you have the right of access (Art. 15 GDPR), rectification (Art. 16 GDPR), erasure (Art. 17 GDPR) and restriction of processing (Art. 18 GDPR). The right to data portability (Art. 20 GDPR) does not apply to processing under Art. 6(1)(f) GDPR.
We notify rectifications, erasures and restrictions to the customers to whom we previously supplied your data, unless this proves impossible or involves disproportionate effort (Art. 19 GDPR). [[ ERGÄNZEN: Verfahren der Mitteilung an Kunden bestätigen ]]
We reply without undue delay, at the latest within one month; in complex cases the deadline may be extended by two months, of which we will inform you within the first month (Art. 12(3) GDPR). If there are reasonable doubts about your identity, we may request additional information (Art. 12(6) GDPR). If there are errors in an official source, we correct our record; a permanent correction also requires a change at the body that keeps the register.
You can lodge a complaint with a data protection supervisory authority (Art. 77 GDPR). The lead authority is the Czech data protection authority Úřad pro ochranu osobních údajů, Pplk. Sochora 27, 170 00 Praha 7, Czech Republic (uoou.gov.cz). You can also contact the supervisory authority of your habitual residence, your place of work or the place of the alleged infringement; in Germany, the data protection authority of your federal state.
The company databases comprise a very large number of records collected from public sources and not from the data subjects. In our assessment, notifying each data subject individually would involve disproportionate effort. We therefore provide this information publicly on this website under Art. 14(5)(b) GDPR and take the safeguards listed in section 6. On request, we provide you with the information on your record individually.
Note for the legal review (remove before publication): supervisory authorities interpret the exemption under Art. 14(5)(b) GDPR narrowly; it requires a documented balancing of effort against intrusion. To our knowledge, the Polish supervisory authority UODO objected in 2019 to a comparable business model of a business information provider because data subjects with known contact details had not been notified individually; the decision should be checked in the original. It also needs to be checked when the information must be provided under Art. 14(3)(c) GDPR (at the latest on first disclosure to customers) and whether at least the persons with a published email address must be notified.
We adapt this information when the sources, scope or purposes of processing or the legal situation change. The version published at b2bkartei.de/betroffenenrechte/ applies.
Version: October 2026 (draft)
