If a Paternity Test for a Child is needed but the Alleged Father is not available for testing, a Grandparent DNA Test may be used. We require the DNA from both Paternal Grandparents for this test. DNA samples from the Mother of the Child is not needed but highly recommended because it makes testing cheaper, easier, and more conclusive. It is for this reason that the test is more expensive if the Mother’s samples are not provided for testing. If the Mother of the Child is not available for testing, please go to Grandparent Test (without Mother).

If either one of the Paternal Grandparents is not available for testing, other tests are available including mtDNA Testing, Y-Chromosome Testing, or a Family Reconstruction.

A simple mouth swab is all that is needed to get a DNA sample from each of the tested parties, however, some unusual samples are accepted. Note that most unusual samples will incur a fee, as we must first extract the DNA in order to analyze it. Contact us for more information.

Paternity Testing Corporation will continue testing your samples until we reach a minimum Grandparent Index (GI) of 10,000, or 99.99% for both Peace-of-Mind (At-Home) Tests and Legal (Chain-of-Custody) Tests. This guarantee applies whether the Mother is included or not, in the event of poor samples (we may request a new sample), or if we find mutations in the Child’s DNA. These would all require either further STR analysis by testing more loci, or by switching methods to RFLP testing; all of which we would do at no additional charge to you, in order to reach our 99.99% probability guarantee.

Before purchasing this test, it is important to contact us first, to discuss your requirements and whether this is the right test for you.

WHAT IS INCLUDED IN THE TEST PRICE?

Whether you need a Peace-of-Mind (At-Home) Test, or a Legal (Chain-of-Custody) Test, the actual lab testing and analysis is identical, with the same level of rigorous testing methods and the same 99.99% probability guarantee. Just because you are getting a ‘home’ test, does not mean you do not deserve proper testing and a correct, conclusive answer. The only difference for a legal test is in how your samples are collected (see below).

The price for this test includes:

• 24/7 personal customer support in English and Thai.
• DNA Sample Collection Kit, containing everything you or your sample collector need to collect samples and complete paperwork. Note that this test fee does not include the Chain-of-Custody (CoC) Fee for legal sample collection, which is paid directly to your sample collector. Please see below for extra information regarding Legal Tests and the additional Chain-of-Custody (CoC) Fee.
• One (1) shipment of your samples (up to 0.5 kg in one shipment) by first-class, international priority courier to our lab in the USA.
• Testing of DNA samples provided on cotton tip for one (1) Paternal Grandfather, (1) Paternal Grandmother, one (1) Child, and one (1) Mother. If the Mother of the Child is not available for testing, it is more expensive – please go to Grandparent Test (without Mother). To test additional people, you will need to add this option to your order. Scroll down the page to add this option to your order. To use unusual samples in this test, you will need to add this option to your order. Scroll down the page to add this option to your order.
• One (1) original, notarized English-language report, and one (1) original, notarized Thai-language report.
• Emailed results as soon as they are ready.
• Posting of hard-copy, notarized results to anywhere in the world by regular mail. To express the postage of your hard-copy results, you can upgrade to first-class, international priority courier. Scroll down the page to add this option to your order.

CHAIN-OF-CUSTODY (CoC) OF SAMPLES FOR LEGAL TESTS

Tests required for legal or official purposes must follow a strict chain-of-custody of the samples, and will incur an additional Chain-of-Custody fee, which is payable directly to your sample collector. This fee covers the collection of DNA samples by a certified, independent third party, the chain-of-custody of samples, and the identification verification process. Learn more about chain-of-custody of samples in our FAQ.

Following this process means your notarized result report will also be recognized as an official, legal document (note that foreign-issued legal documents used in Thailand also need to be authenticated after they are issued. Learn more about the difference between notarized, legal, and authenticated results in our FAQ.)

The sample collector could be your own doctor (with pre-clearance from PTC), one of our world-wide, certified collection centers, or a PTC representative from our Bangkok office.

• If you will visit our Bangkok office for your sample collection, or if one of our Bangkok PTC representatives will visit you at your home, hotel, or hospital, you can add the payment for Legal Sample Collection by PTC option to your order. Scroll down the page to add this option to your order.
• For all other sample collections, you must pay your sample collector directly. Contact us if you need more information or need to find a certified sample collector near you.