How to check a person before a deal
What can legally be found out, which sources work and how to read the result of a check.
Updated 2 August 2026 · 9 min read
A deal with a person - buying a business, a partnership, a loan, a power of attorney - almost always relies on their reputation and stated background. The problem is that the stated background is rarely checked: the parties trust the presentation, mutual acquaintances and a confident tone. This is precisely what most fraud schemes are built on - from inflated experience to concealed bankruptcies and parallel conflicts that the prospective partner does not mention.
This guide explains how a check of a person before a deal is structured: what information can genuinely be established by lawful means, from which sources it is drawn, how long it takes and why an automated report from an aggregator does not replace an analytical check. It also covers how to distinguish a confirmed fact from a rumor, and what to do if the check reveals contradictions but the deal is still needed.
This material does not constitute legal advice. The availability of sources and the permissible depth of verification depend on the country, purpose and legal basis - these limits are agreed with BLACKFILE before work begins.
Who this material is for
- for entrepreneurs before a partnership or sale of a stake
- for investors assessing the people behind a project
- for lawyers preparing a client's transaction
- for private individuals before a major personal decision
Questions covered in this guide
- what information about a person can lawfully be established
- how analytical verification differs from an automated report
- how identity is confirmed and namesakes are excluded
- how to read a report: facts, conclusions, gaps
- which red flags require a transaction to be stopped
Contents
- Why check a person if "everyone knows him"
- Map of lawful sources: registers, courts, publications
- Identification: how not to check someone else's namesake
- What cannot be seen through lawful means, and why it matters
- Red flags and their weight in a decision
- How to use the result in deal negotiations
Verification does not include access to banking secrecy, correspondence or closed databases. The absence of negative records does not guarantee the absence of risk
Related practice areas
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Outline the situation in general terms, without documents or personal data. BLACKFILE will assess whether the work can lawfully proceed and propose an approach.