Quick answer
A COSHH course certificate’s validity or refresher policy is set by its provider and any relevant employer or contract requirements. That is separate from the employer’s duty to keep instruction suitable for the actual risks and changes. Do not wait for a certificate date if a task, substance, method or competence gap requires updated instruction.
Separate certificate policy from workplace competence
Check the particular certificate, issuing provider’s current terms and any genuine workplace requirement. Do not generalise a provider’s two- or three-year recommendation into a universal statutory expiry.
GB COSHH regulation 12 requires suitable information, instruction and training and adaptation to significant work/method changes. The rule is about suitability for exposure and precautions, not one named commercial certificate.
Use practical refresher triggers
| Trigger | What to check |
|---|---|
| New product or formulation | Changed hazards, use and precautions. |
| New equipment or method | How the control works and what failure means. |
| Role/site change | Different tasks, exposure and escalation arrangements. |
| Incident or near miss | What was misunderstood and whether the procedure is workable. |
| Observation of weak practice | Knowledge, equipment, language or supervision gaps. |
A scheduled refresher can support the system, but it does not replace action at these earlier triggers.
Assess the gap before choosing the response
Use observation and task-related questions to decide whether the need is new knowledge, a demonstration, supervision, technical reassessment or a full course. Repeating the same awareness module may not repair an unusable control or missing equipment.
Illustrative example: an employee’s certificate remains within the provider’s recommended period, but the workplace changes from manual pouring to a dosing system. Instruction in the new unit and failure response is still needed.
Use the applicable framework and useful records
HSENI COSHH guidance explains Northern Ireland’s separate requirements for information, training, supervision and review. Check that framework rather than treating the GB instrument as the NI law.
Record the task, learning, practical check, remaining supervision and next review trigger. Keep the certificate as one item of evidence, not the entire competence record.
Refresh in a way staff can use
Explain the changed risk and demonstrate the actual procedure. Ask the person to show how they check product identity, use the control and report a failure. Arrange competent cover until they can perform the task as required.
Confirm provider-specific replacement or renewal arrangements directly if certification evidence is needed. Do not promise that refresher attendance alone satisfies every COSHH responsibility or makes someone competent to assess specialist risks.
Next steps
- Check the particular provider/employer certificate policy.
- Review task changes and evidence of competence now.
- Provide targeted instruction, practical checks and supervision.
- Record the evidence and future review triggers.
Read the official practical guidance — Use the current source alongside the procedures for your own business.