Do old test reports mean I need to retest?
Do not decide from the report date alone. Compare the tested product with today's specification, review current requirements and check any certificate validity conditions. Ask a competent laboratory to explain whether existing evidence, targeted testing or a fresh assessment is appropriate. Arrange the factory evidence through Cambridge China Bridge.
Treat age as a review trigger
An old report needs a documented review before you rely on it for a new order. Separate the laboratory report, any conformity certificate and any customer acceptance condition. Ask whoever claims the report has expired to identify the exact document and the rule or purchasing condition they mean.
Start with checking whether the report covers your order. This guide addresses the next decision: whether that evidence still supports the current product, and what additional assessment to commission.
Compare the tested and current designs
Ask the factory for the tested specification, current drawings, BOM and a change history. Compare materials, coatings, components, dimensions, firmware, power supply, manufacturing processes and intended use. Request supporting records for claims that nothing has changed; matching model names and photographs are not enough for this review.
Give the laboratory the actual differences and ask which hazards or test results they could affect. A component change may need targeted testing; missing historical records may justify a broader assessment. Agree the scope before sending samples. Use the material substitution guide to control proposed factory changes.
Check requirements for the destination
Write down the intended market, product use and conformity route before reviewing the old report. Ask a competent adviser to compare the requirements applicable to the planned supply with those used in the original assessment. Keep Great Britain and Northern Ireland separate in the brief rather than assuming an identical assessment.
For Great Britain, designated standards do not replace essential requirements, and manufacturers remain responsible for meeting applicable law. Use finding the correct product standards, then ask the adviser to check the report's standard edition against the relevant published notice, including any restrictions or transition dates.
Check certificate conditions separately
Read any certificate's expiry date, product scope, conditions and supporting assessment references. Ask the issuing body whether changes or renewal affect your proposed supply. Separately, ask the customer or sales platform to provide any document-age condition in writing. Do not treat a purchasing condition as a general legal rule.
A sector-specific example is marine equipment: UK approved guidance states that type examination certificates shall be valid for a maximum of 5 years from issue. That statement concerns those certificates. Do not apply it as an expiry period for every laboratory test report.
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Record the decision before production
Request a written conclusion identifying the reviewed documents, product revision, requirements checked and unresolved gaps. Ask the laboratory to explain whether it recommends retaining existing evidence, adding targeted tests or undertaking a fresh assessment. Request reasons for excluding tests as well as for adding them.
If testing is needed, agree representative samples, selection records and the production revision they represent. Keep the conclusion and resulting evidence in your product compliance file. Cambridge China Bridge's staff in China can help gather factory records and coordinate samples for the agreed assessment.
Frequently asked questions
Does an old test report automatically need replacing?
Use its age as a reason to review it. Compare the current product, applicable requirements and any certificate or customer conditions before deciding what additional evidence to obtain.
Do I need to repeat every test after a design change?
Ask the laboratory to map the change to affected hazards and test results. Request a justified scope for targeted testing or a broader assessment rather than selecting tests from the change description alone.
Can the factory just update the report date?
Request the laboratory's explanation of what a reissued document represents. A new date alone does not show that the current production design was tested or that changed requirements were assessed.
What if the factory says nothing has changed?
Ask for revision-controlled drawings, BOM, material and component records, and the change history. If the historical comparison cannot be established, ask the laboratory how that uncertainty affects the assessment scope.