4 DNA Testing - Services, Prices & Refund Policy
For prices for court-admissible testing, click here
| Paternity testing - determines the probability that an alleged father is the biological father of a child or can be excluded as the biological father. | Includes: child, alleged father (with or without mother) - £145 Additional person: £75/person |
| Maternity testing - similar to a Paternity Test, but determines the probability that a woman is the biological mother of a child. | Includes: child, alleged mother (with or without father) - £150 Additional person: £75/person |
| Grandparent/Aunt/Uncle testing - This test determines the likelihood that a person is the grandparent, aunt or uncle of a child. | Includes: child and 1 grandparent, aunt or uncle - £170 Additional person: £80/person |
| Siblingship testing - this type of test determines the statistical probability of whether siblings (brother and sisters) share the same 2 parents or not. Including a known common parent increases the accuracy of this test. | Includes: two siblings (including a known common parent increases the accuracy of this test) - £170 Additional family: £80/person |
| Twin zygosity testing - this test determines whether siblings are fraternal or identical twins or siblings. Testing of either or both parents is optional Results take 2 - 3 weeks to complete | Includes: Two siblings - £170. Additional family: £80/person |
| Missing parent testing - in cases where the mother or father is missing or deceased, this test determines maternity or paternity by using the DNA from the maternal or paternal grandparents. | Includes: parent, child and both grandparents - £330. Additional person: £80/person |
Non-compliant samples
Samples must be received at 4 DNA Testing within 3 days of the samples being taken. Samples received late and/or in a condition not in compliance with the instructions provided will be the responsibility of the client. Costs related to subsequent sampling and testing due to non-adherence to the instructions provided will also be the responsibility of the client.
In the event your samples do not meet the requirements as stated in the instructions provided, 4 DNA Testing will make every reasonable effort to contact you via the telephone immediately. If we cannot contact you immediately (or if you do not provide a telephone number where you can be reached) testing will commence as scheduled.
If we are able to contact you, you will be given the option to proceed with the non-compliant samples at your risk, or to purchase another kit and repeat sample collection. The following fees may be applied on a case-by case basis:
- If you choose to resample: £20 to £25 per kit shipment (maximum of 3 participants)
- If you choose to proceed (or if we are unable to contact you immediately): £60 to £140 to resample and retest.
- Additional fees may apply for legal cases or tests involving more than 3 participants.
Samples must be submitted within 3 months of kits being ordered.
All refund requests must be accompanied by the 4 DNA testing Refund Request Form. Print this form and follow the instructions.
This is a PDF file (20Kb) and requires Adobe Reader
Refunds for test service orders cancelled prior to shipping and/or handling will have the following fees deducted:
- £25 Refund Processing Fee
- £20 Administrative Fee per Scheduled Shipment.
Refunds for Immediate tests
Once you have sent off your samples to us, if you cancel before they are shipped and/or handled by us, you will be charged £45. If you cancel after they have been shipped and/or handled by us, you will be charged £100.
Refunds for Kit Tests
If you cancel within 7 days after the initial contact with us and before you have sent the samples back to us, a charge of £45 will be made and the refund will be issued after the kit (including the unused return envelope) has been returned to: 4 DT (postmarked within 30 days of order date) to the following address:
- 4 DT
- PO Box 6158
- Blandford Forum
- Dorset
- DT11 1AF
If you cancel after the samples have been shipped and/or handled, you will be charged £100.
If you have any enquiries regarding the return policy, please contact us at or phone us at 01929 472898.
- Sibling studies require hand calculations
- Twin studies require hand calculations
- Incomplete authorisation form sent in with samples (missing information)
- Test results had single or double exclusion (must be at least 3 to be released)
- Gel failure (must rerun test)
- Unknown race which causes the results to be hand calculated
- Related alleged fathers usually result in additional testing
- It could happen, though slight, of a sample not containing enough DNA for the test. This is due to collection error or the client's mouth's conditions (dry mouth, excessive tobacco usage, etc). We will send you another kit at no charge.
- Low Paternity Index - If all the DNA systems match between the alleged father and child, usually the result indicates a 99.9% probability of paternity. Sometimes, however, the genes shared between the alleged father and child are so common that the probability of paternity doesn't reach 99%. Further testing will likely reveal additional matches and will increase the probability to a minimum of 99%. Another cause of low paternity index is if no race is submitted on either the alleged father or mother.
If your results are over the time stated, please contact us by going to Check Status and filling in the information.