people just like you

Information for people just like you

Established in 1987, Cellmark is the UK's most experienced DNA testing service.

Paternity testing is not a decision which should be entered into lightly. Please consider whether this is the best course of action, particularly for any children involved. It may help you to discuss the issues and possible outcomes with a third party, either a friend or family member or an independent advice service.

Once you have made the decision to proceed Cellmark can assure you that your case will be dealt with in a highly professional and ethical manner and we will do all we can to make the process as simple as possible for all involved.


  • DNA testing overview
  • What's included in the price?
  • Independent advice
  • DNA relationship testing

    Relationship testing is undertaken using DNA analysis called Short Tandem Repeat (STR) profiling. A minimum of 22 STR tests are used to analyse a claimed relationship. In paternity cases when a mother, child and father are tested, Cellmark will either exclude the man with 100% certainty, or provide a probability of paternity in excess of 99.9999%.

    Developments in the sensitivity of DNA analysis mean that your sample can be taken, simply and painlessly, using mouth swabs. For your test results to be accepted by the UK courts you will need to have the sampling to be taken by an independent person, with no financial interest in the outcome of the tests.

    Any reputable DNA testing company, such as Cellmark, will be accredited by the Ministry of Justice as a body that may carry out parentage tests as directed by the civil courts in England and Wales under section 20 of the Family Law Reform Act 1969. This means that they abide by the terms of the Human Tissue Act, adhere to the Human Genetics Commission's "Common Framework of Principles", their labs have the relevant ISO accreditation (ISO17025) and they market their services in an ethical manner.

    Established in 1987 Cellmark pioneered the introduction of DNA analysis for paternity testing and has already undertaken DNA sampling for over 500,000 people - just like you.

  • Make sure you check the small print!

    The DNA testing market has become increasingly competitive and a number of companies are claiming to be the cheapest but make sure that you are comparing like for like - not all companies include the same details in their basic price.

    Cellmark includes the following in our standard price:
    ALL sampling kits AND the cost of sending them to UK sampling locations
    Pre-paid return envelopes to safely transport the samples to our laboratory
    The cost of testing the samples once they have been received at our laboratory
    Our standard turn around time - NEXT (working) DAY - this covers paternity, immigration, sibling, avuncular and grandparentage tests - not just for paternity tests
    The cost of producing and delivering the final test report to the “customer”
    Our advice service for the duration of the case – before and after the final test report – accessible via email, FreePhone 0800 036 2522, and our web Chat service.

    Please note our standard fee does not cover the cost of taking the samples, these must be paid direct to the sampler at the sampling appointment. However if required we can arrange a pre-paid sampling appointment on your behalf.

  • Get access to independent advice and guidance

    Cellmark is committed to ensuring that all parties have access to independent advice and guidance and the following links may help you in making your decision to proceed (or not to proceed) with testing.

    England and Wales:
    Get a DNA test
    CAFCASS 0300 456 4000
    Child Maintenance 0800 988 0988
    Citizens Advice 03444 111 444
    Families Need Fathers 0300 0300 363
    Gingerbread 0808 802 0925
    Relate 0300 100 1234

    Family Matters
    Children in Scotland 0131 313 2322
    One Parent Families Scotland 0808 801 0323
    Scottish Child Law Centre 0131 667 6333

    Citizens Information 0761 07 400
    Child and Family Agency 01 7718500
    One Family 1 662 9212
    Treior 1890 252 084

    If you have any concerns please phone our Customer Services team on 0800 036 2522.


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Useful links

From ensuring that you have the right information before commencing the process to understanding what the final test report means - we aim to provide assistance every step of the way.