1. Introduction

The purpose of this guideline is to indicate which case details and personal data can be anonymised in reports by experts and how to do this. This guideline applies to case details in reports for:

  • assessment or reassessment of court experts
  • workshops, peer reviews and training sessions for internal and external target groups

It is up to the expert to determine which data should be anonymised and how. This document serves as a guideline to help the expert in this process.

Reports of some fields of expertise do not lend themselves well to be anonymised, because this does not benefit the readability in the context of a careful assessment. This applies, for example, to the fields of expertise Legal Psychology and Forensic psychiatry, psychology and orthopedagogics (FPPO) at the NRGD. In these cases, it is up to the expert to assess whether and in what way the reports should be anonymised. For these fields of expertise generalising the names of the persons involved will suffice.

2. Anonymisation

General principle: Any data that directly identifies a natural person must be anonymised.

  • Any data that directly identifies a natural person who is not professionally involved in the proceedings must be anonymised (victim, defendant, witnesses, etc.);
  • Data that may indirectly identify natural persons must be anonymised, unless the data is important for the assessment of the report (address details, specific locations, date of birth, photos, etc.);
  • Data about natural persons who are involved in the proceedings professionally and who are important for the assessment of the report will not be anonymised (experts, commissioning party, co-author of the report, etc.).

You can anonymise data in three different ways:

  1. Data deletion
    If data is not relevant to assess the report, it can be deleted completely.
  2. Black out data
    If data is not relevant to assess the report but cannot be deleted immediately, it can be blacked out. E.g. for non-editable photographs/images/text files. Please note that digital blacking out must be done in such a way that it cannot be undone. For example, the expert can use the 'Redact' option in Adobe Acrobat Pro.
  3. Generalise data
    If data is relevant to assess the report, it can be generalised. Examples: names of victims and suspects can be generalised to [victim1] and [suspect1] and the name of the Public Prosecutor can be generalised to PP.

The diagram below serves as an example. At their discretion, experts can/may deviate from this. If in doubt, please contact the NRGD. The data below can be anonymised as follows:

Anonymisation examples
Personal dataRequired for assessmentPotential processingComment
Case numberNoOwn referenceFor inclusion in List of Case Information
Date of reportYesn/aFor inclusion in List of Case Information
Name of author of reportYesn/a
Name of the co-author of the report/supervisorYesn/aNecessary for searching assessors
Other namesNoDeleting or Generalising data
Telephone numbersNoDelete data
Date of requestYesGeneralise dataState only the year
Reference of requesting partyNoDelete data
Reference of commissioning partyNoDelete data
Name PP/EJ/policeNoGeneralise dataPP/EJ
Whereabouts defendant/person under investigationDependsGeneralise dataE.g. Custodial institution/young-offenders institution
LocationsDependsGeneralise data[domicile], [school], [crime scene1], etc.

Seal number

identity seal
NoDelete data
Official report numberDependsGeneralise or delete dataWhen processing multiple reports in one file
Public Prosecutor's Office's numberNoDelete data
Examining judge’s numberNoDelete data

SIN number

NoGeneralise dataReplace multiple SIN numbers with non-reducible number
Name of Defendant (1 to x)NoGeneralise dataReplace by [defendant] of [defendant1], [defendant2]
Victim (1 to x)NoGeneralise dataReplace by [victim] or [victim1], [victim2]
Witness (1 to x)NoGeneralise dataReplace by [witness] or [witness1], [witness2]
Names of familyNoGeneralise dataGive mother, father, uncle, aunt etc another name
Date of birthNoGeneralise dataReplace by year of birth or age
GenderDependsGeneralise data

M/F if required,

X where possible
Place of birthNoGeneralise data[place of birth]
Country of birthDependsGeneralise data[country of birth]
Ethnic groupDependsGeneralise dataMention if relevant. E.g. for injury interpretation or psychiatric/psychological evaluations of the defendant  
Date of offenceDependsGeneralise dataFor multiple offences [dateOffence1] etc.
Time examinationsYes
Photos pieces of evidenceDependsBlack out dataAnonymise faces, registration numbers, IP addresses, etc., unless required for assessment of the report
DNA profilesYes

3. Principle

Anonymisation refers to data that could lead directly or indirectly to the identification of a natural person., Anonymisation contributes to the protection of personal data within the meaning of the General Data Protection Regulation (GDPR).