The Assuredna test gives results in one to five days.
Manufacturer Anglia DNA has laboratories accredited by the British Ministry of Justice to carry out tests for courts in England and Wales.
For the test, samples of cells are collected from the mouth of the father, child and mother.
These cotton swabs are then placed in colour-coded envelopes and posted to Anglia DNA for analysis.
Both mother and father must sign forms giving their consent for the test and include proof of identity.
The test is available to anyone aged 16 or over and costs £29.99 to buy, plus a £129 lab fee.
Boots last night said they have no plans to launch the Assuredna test in Ireland.