Cheek swabs are considered the most reliable and convenient method of sampling DNA. In cases where it is not possible to use a swab, we will accept alternative samples, though we cannot guarantee a successful result with these samples. Because of this uncertainty, we will initially carry out a viability test to ascertain if there is enough DNA present. If this is successful, you can progress to a standard DNA Test. Please note that the viability test carries an additional charge. You can contact us for more details.