Yes, a court-appointed forensic expert (Polish: biegły sądowy) is fully entitled to prepare a private expert opinion – for example, on behalf of a company, law firm, or private individual.
Such an opinion is not an official court document, but it can be submitted to the case file as supplementary evidence and very often carries significant weight due to the expert’s proven qualifications and court-listed status.
Key differences
- Court/commissioned opinion – prepared at the request of a court, prosecutor, or police
- Private expert opinion – prepared at the request of a party or third party, but issued by the same court-recognised expert
In practice, many Polish law firms and companies deliberately commission private opinions from court-appointed experts because of their objectivity, experience, and the high evidential value these reports have before the court.