Why Would I Need This Test?

A chain of custody drug test is usually requested for formal or legal reasons.

This may include employer screening, TfL requirements, court proceedings, family court cases, or other situations where documented sample handling is needed.

What Does “Chain of Custody” Mean?

Chain of custody is the step-by-step documentation of a test sample from collection to final reporting.

It records the collection, transfer, receipt, analysis, storage and disposal of the sample.

Each person who handles the sample is documented. This helps prove that the result belongs to the correct person and has not been tampered with.

You can read more about the chain of custody procedure here .

Which Substances Are Included?

This test checks for alcohol and a broad range of commonly tested drug groups.

Where is the Test Done?

Chain of custody drug tests can only be done at the laboratory location below:

How Do I Book This Test?

First, pay for the test online using the link below.

We will then contact you to arrange your appointment. Appointments are usually available within 1-3 days, Monday to Friday.

Please make sure you provide your correct email address and mobile number when ordering.

How Long Do Results Take?

For a chain of custody urine drug test, a negative result is usually reported within 2-3 working days.

If the initial test is positive, the sample is sent for further specialised confirmation testing. This usually takes an additional 5 working days.

What is a False Positive Result?

A false positive means the first test appears positive, but further specialised testing confirms it is actually negative.

This means the first result was not confirmed. False positives occur in less than 1% of tests.

What is an Invalid Test?

An invalid test means there is doubt about the sample quality or whether the sample is suitable for accurate testing.

This can happen if a urine sample is too dilute. It may be caused by drinking too much fluid before the test, or by possible sample tampering.

If the test is invalid, it cannot be reported as accurate. The test will need to be repeated and paid for again.