Forced labour fundamentals · Guide

Passport and identity-document retention as a forced labour indicator

A worker without their passport cannot easily change employer, travel, or prove their status to the police. That is why the ILO lists retention of identity documents as an indicator of forced labour — and why 'we keep them safe for workers' is one of the most common explanations auditors hear.

Published by Libera Europe · Last reviewed 5 October 2026

Why document retention matters

Identity documents are leverage. Holding them restricts movement, deters complaints to authorities and makes leaving a job expensive or dangerous — particularly for migrant workers whose legal status depends on the papers. The ILO's indicators describe retention of identity documents as a sign that a worker may not be free to leave, especially where the worker cannot get them back on request.

Some jurisdictions treat confiscating or withholding documents in connection with forced labour or trafficking as a criminal offence in its own right — for example 18 U.S.C. § 1592 in the United States. The position varies by country; check local law.

Safekeeping versus retention

Not every arrangement is coercive. The test is control: can the worker get the document back, without delay, without asking permission and without penalty?

Distinguishing features. A 'yes' in the right column is a reason for human review, not a finding.
QuestionLower concernHigher concern
Who holds the key?Worker-held personal lockerEmployer, agent or supervisor
Access on requestImmediate, any timeRequires approval, notice or a reason
ConsentVoluntary, written, revocableCondition of employment or recruitment
Original or copyEmployer holds a copy onlyEmployer holds originals
Linked to debt or contract endNoReturned only after repayment or contract completion

How to check for it

  • Ask for the written document-holding policy, then check whether practice matches it.
  • Look at the physical arrangement: lockers, who holds keys, where originals are stored.
  • Ask agencies — including sending-country sub-agents — the same questions as the site.
  • Never ask workers about documents in front of supervisors or agents.
  • Use a confidential channel so workers can raise it without being identified.

Remediation

  • Return all originals to workers and record the date — confirmed by workers, not only management.
  • Provide individually controlled storage if workers want it.
  • Correct the policy for the site and every agency involved.
  • Look for the indicators that commonly accompany retention: debt, restricted movement, withheld wages.
  • Re-check through worker voice after a period, rather than closing on attestation.

Sources and method

Written by Libera Europe from the primary sources below. Where a fact could not be confirmed in a primary source it was left out. This is general information, not legal advice; laws and guidance change, so check the current official text.

Libera produces risk indicators as prompts for human review, not findings. It does not determine that forced labour occurred, does not guarantee compliance with any law and is not legal advice.

Related intelligence

Libera puts this workflow in one place: structural screening, confidential worker signals with verified access, human review, cases, evidence and remediation records.