Remote DNA Testing: How to Order, Collect and Return Samples from Abroad

Can you take a DNA test when the participants live in different cities or countries? In most cases, the answer is yes. Remote DNA testing allows each person to collect their sample separately before sending it to the same laboratory for comparison.

Participants do not usually need to travel or meet in one place. Depending on the laboratory and the purpose of the test, they may be able to:

• receive collection kits at separate addresses;

• collect cheek-swab samples independently;

• return each sample from a different country;

• track the packages until delivery;

• receive the final report online.

However, a successful remote DNA test requires more than simply placing swabs in the post. The correct test must be ordered, every sample must be linked to the same case, and the laboratory’s packaging, consent and shipping instructions must be followed carefully.

This guide explains how to organise a remote DNA test from the UK or abroad, which kit-delivery options are available, how to protect sample quality and when supervised collection is necessary.

Can a DNA Test Be Completed When Participants Live Apart?

Geographical distance is not normally an obstacle to private relationship testing.

A remote procedure may be suitable for:

• a paternity test involving a parent who lives abroad;

• a maternity or sibling DNA test;

• family members living in different parts of the UK;

• expatriates seeking to verify a biological relationship;

• relatives participating in genetic genealogy research.

Each participant can usually collect their sample separately. The samples are then brought together under one laboratory case number and analysed as part of the same test.

Testing will generally not begin until the laboratory has received all the samples required for the analysis. A delay affecting one participant can therefore delay the entire case.

Decide Whether You Need a Private or Legal Test

Before ordering, determine how the result will be used.

A private home DNA test is primarily intended to provide personal information. Samples may be collected without professional supervision, provided that the participants have given the necessary consent.

A legal or officially recognised test follows a stricter procedure. Identity documents must be checked, collection must be witnessed and a documented chain of custody must be maintained. A standard self-collection kit should not be assumed to have evidential value.

For readers in England, this distinction is particularly important. The requirements affecting consent, court proceedings and official use are explained in our guide to DNA testing law in England.

How to Order a Remote DNA Test Online

Choose the Correct Relationship Test

The first step is to identify the biological relationship that needs to be examined.

Depending on the circumstances, the appropriate analysis may be:

• a paternity test;

• a maternity test;

• a sibling DNA test;

• a grandparentage test;

• an avuncular test involving an aunt or uncle;

• an ancestry or genetic genealogy test.

Direct parentage tests are usually more straightforward to interpret than indirect relationship tests. When the alleged parent is unavailable, the laboratory may recommend including additional relatives to strengthen the statistical analysis.

Before paying, provide the laboratory with an accurate description of the family relationships involved. This helps it determine which participants should be tested.

Provide Every Delivery Address

If the participants live apart, tell the laboratory before the kits are dispatched.

You may need to provide:

• the full name of each recipient;

• a complete postal address;

• a telephone number for the courier;

• an email address;

• the destination country;

• any special delivery instructions.

Check whether the quoted price includes one kit or several. Additional kits and international deliveries may be charged separately.

Check the Payment Currency and Fees

Online DNA-testing providers may accept:

• debit or credit cards;

• PayPal;

• bank transfers;

• international money-transfer services such as Western Union, where offered.

Payment methods vary between laboratories and countries. Before confirming the order, check:

• the currency in which you will be charged;

• card or transfer fees;

• exchange-rate costs;

• whether international postage is included;

• whether return shipping is prepaid.

For international orders, the cheapest payment method is not always the most practical. A traceable payment and a clear invoice can be useful if the delivery or test needs to be investigated later.

Three Ways to Organise Collection Kits for Different Participants

Option 1: Ask the Laboratory to Send Several Official Kits

The simplest solution is to request one official collection kit for each address.

The laboratory prepares the required number of packages and sends them directly to the participants. Every kit should carry the same case reference or customer number.

This option offers several advantages:

• participants receive the laboratory’s approved materials;

• collection instructions are included;

• labels and forms are less likely to be completed incorrectly;

• each person can deal directly with the provider if assistance is needed.

The main disadvantages are the additional delivery costs and possible customs delays. International economy post may take several weeks on certain routes, particularly where local postal tracking is limited.

When ordering several kits, confirm whether they will be dispatched simultaneously and whether the laboratory will wait for every sample before starting the analysis.

Option 2: Prepare a Home Collection Kit

Some laboratories allow participants to prepare their own collection materials instead of waiting for an official kit.

This may be useful when:

• international delivery is unusually slow;

• the participant lives in an area with an unreliable postal service;

• the official kit has been lost;

• collection needs to take place quickly.

A basic home kit may include:

• sterile, individually packaged buccal swabs;

• clean paper envelopes;

• printed consent and identification forms;

• sample labels;

• the laboratory’s case reference;

• a secure outer envelope.

Do not improvise without the laboratory’s approval. Providers may have different requirements concerning the type of swab, number of samples, drying time, labelling and documentation.

A correctly prepared home kit can produce a usable sample, but only when the laboratory’s instructions are followed exactly.

Option 3: Request Express Kit Delivery

For urgent cases, some providers offer express delivery through an international courier.

An express package may include:

• sterile collection swabs;

• consent forms;

• detailed instructions;

• participant labels;

• a laboratory return address;

• a pre-addressed return envelope.

Delivery may take less than a week on many routes, but no universal timeframe can be guaranteed. Customs checks, remote locations, public holidays and incorrect address information can all cause delays.

Express delivery is normally charged separately. The outward delivery fee may not cover the return shipment, even when a pre-addressed envelope is supplied.

How to Complete a Remote DNA Test Step by Step

1. Order the Test

Select the correct relationship test and number of participants. Tell the laboratory where each person is located and whether the result is required for private or official use.

2. Record the Case Reference

Every participant must use the same customer number, order number or case reference.

This identifier should appear on:

• the sample envelopes;

• the consent forms;

• the return documentation;

• any email sent to the laboratory.

Without a shared reference, the laboratory may be unable to associate separately delivered samples with the same test.

3. Prepare for Collection

Read the instructions before opening the swabs.

Unless the laboratory states otherwise, participants may be asked to avoid eating, drinking, smoking, chewing gum or brushing their teeth for a specified period before collecting the sample.

Wash and dry your hands, prepare the labels and make sure that each participant’s materials remain separate.

4. Collect the Cheek-Swab Samples

A buccal sample is collected by rubbing the sterile swab firmly against the inside of the cheek. This transfers cells from the mouth onto the swab.

The procedure is:

• non-invasive;

• painless;

• suitable for collection at home;

• generally appropriate for adults and children, including young children when properly supervised.

Use the number of swabs requested by the laboratory and avoid touching the cotton or collection tip with your fingers.

5. Allow the Swabs to Dry

Moisture can encourage bacterial growth and damage the sample.

Follow the laboratory’s instructions regarding drying time. Swabs are commonly left to air-dry in a clean location before being placed in their individual paper envelopes.

Never package a wet swab in a sealed plastic bag unless the laboratory has supplied a specialised container designed for that purpose.

6. Complete the Forms

Each participant may need to provide:

• their name and date of birth;

• their stated relationship to the other participants;

• a signature confirming consent;

• the date of collection;

• the case reference;

• details of the person who collected or witnessed the sample.

Incomplete or inconsistent documentation can delay the analysis.

7. Return the Samples

Participants can send their packages separately. There is no need for one person to collect every envelope first, unless the laboratory specifically requests this.

Each participant should:

• use the correct laboratory address;

• choose a trackable delivery method;

• keep proof of postage;

• retain the tracking number;

• inform the laboratory that the sample has been dispatched.

8. Wait Until All Samples Have Arrived

The laboratory will normally register each package as it arrives. Analysis begins once the complete set of required samples and documents has been received.

Processing times vary. Many relationship-test providers issue reports within approximately 3 to 10 working days after the full case has been accepted, but complex tests, poor-quality samples or incomplete documents may require more time.

9. Receive and Review the Results

Results may be delivered by email, secure online portal or post, depending on the provider and type of test.

A DNA report contains statistical information that must be interpreted in context. Our guide to understanding DNA test results explains the difference between an exclusion, a probability of relationship and an inconclusive finding.

Which Sample Is Best for Remote DNA Testing?

Cheek Swabs Are Usually the Preferred Option

Buccal swabs are widely used for remote relationship tests because they are easy to collect and can provide sufficient DNA for analysis.

Their practical advantages include:

• no needles or blood collection;

• no medical appointment for a private test;

• straightforward packaging;

• easy collection from participants in different locations;

• good compatibility with common parentage analyses.

Storage limits vary between providers. Do not assume that a sample can be kept for a fixed number of weeks or months. Collect and return it within the period stated by the laboratory.

For a detailed comparison of cheek swabs, hair, toothbrushes and other materials, see our guide to DNA samples accepted for testing.

When Might an Alternative Sample Be Considered?

A standard cheek swab may not be available when the person is deceased, inaccessible or unable to cooperate.

Depending on the laboratory, possible non-standard samples may include:

• hair with attached roots;

• a used toothbrush;

• a dummy or pacifier;

• nail clippings;

• a tissue containing biological material;

• a personal item regularly used by the participant.

These materials are more difficult to analyse than a controlled cheek swab. They may contain:

• too little DNA;

• DNA from several people;

• bacteria, mould or chemical contamination;

• degraded genetic material.

The laboratory may charge an additional extraction fee, and a result cannot be guaranteed.

Consent also remains essential. In England, a personal item should not be submitted for DNA analysis merely because it is physically available. Confirm the legal and consent requirements before collecting or sending any non-standard sample.

Should a Doctor or Professional Supervise the Collection?

When Supervised Collection Is Useful

Professional collection may be appropriate when:

• the result could be used in court;

• the test relates to a visa, passport or immigration matter;

• there is a risk of sample substitution;

• one of the participants is a minor;

• the participants do not trust one another;

• formal identity verification is required;

• one participant is abroad and cannot attend a UK appointment.

A doctor, nurse or other approved professional may be able to witness the collection. However, simply asking any doctor to take a sample does not automatically make the test legally valid.

For official use, the laboratory should approve or arrange the collector and provide the correct chain-of-custody procedure.

What Happens During a Supervised Collection?

The authorised collector may be required to:

1. inspect the unopened kit;

2. verify each participant’s identity;

3. check passports or identity documents;

4. obtain signatures and consent;

5. supervise or perform the swabbing;

6. take identification photographs where required;

7. seal and label the samples;

8. document the transfer;

9. send the package directly to the laboratory.

This process reduces the risk of impersonation, mislabelling or sample exchange.

Legal Requirements for Remote DNA Testing in England

Consent Is Required

For a DNA sample to be taken in England, permission is generally required from:

• the person being tested, when they are an adult;

• a person with parental responsibility, when the participant is under 16.

A participant should understand what sample is being collected, why the test is being performed and how the result will be used.

Submitting another person’s biological material without the necessary consent may breach the Human Tissue Act 2004. Discreet testing should therefore not be confused with non-consensual testing.

Home Tests and Court-Admissible Tests Are Not Equivalent

A private self-collection test can provide a biological result for personal information. However, the laboratory cannot independently prove who supplied an unsupervised sample.

A court-ready test requires:

• verified identities;

• witnessed sample collection;

• documented chain of custody;

• appropriate consent;

• analysis by an approved and accredited laboratory.

For a parentage result intended for proceedings in England and Wales, consult the official GOV.UK guidance on DNA tests for court use before ordering.

Starting with a private kit and attempting to convert the result into legal evidence later may lead to the test being repeated.

How to Check Whether a DNA Laboratory Is Reliable

Look Beyond Marketing Claims

The reliability of a DNA test depends on both the scientific analysis and the procedures used to identify and handle the samples.

Before ordering, check:

• the name and physical location of the analysing laboratory;

• whether testing is outsourced;

• which accreditation applies;

• whether the accreditation covers relationship testing;

• how samples are tracked;

• how results and personal data are protected;

• whether the provider clearly distinguishes private and legal services.

Accreditation Relevant to England

ISO/IEC 17025 accreditation is an important indicator of a laboratory’s technical competence for defined testing activities. In the UK, the accreditation schedule should be checked to confirm that the relevant analysis falls within its scope.

For court-directed parentage testing in England and Wales, verify that the provider appears on the applicable Ministry of Justice list.

AABB accreditation may be relevant to certain laboratories and procedures in the United States or international cases. However, it should not be treated as a substitute for the accreditation required by a UK court, the Home Office or another British authority.

How to Return DNA Samples Internationally

Choose a Trackable Delivery Service

For international returns, a recognised courier is often preferable to untracked ordinary post.

Common options include:

• DHL Express;

• FedEx International;

• UPS;

• another established courier offering end-to-end tracking.

The most suitable service depends on the country of origin, destination, local regulations and whether the courier accepts the package contents.

A reliable service should provide:

• a tracking number;

• online delivery updates;

• proof of delivery;

• a predictable delivery route;

• customer support if the package is delayed.

Packaging the Samples Correctly

Unless the laboratory supplies different instructions:

• keep each participant’s swabs separate;

• use individual paper envelopes;

• label every envelope clearly;

• allow swabs to dry fully;

• include the required forms;

• use a strong outer envelope or box;

• protect documents from moisture;

• do not place loose swabs directly inside the shipping envelope.

Never use improvised preservatives, liquids or refrigeration unless specifically requested.

Completing Customs Documentation

Customs and courier requirements vary by route. Use the contents description and commodity information supplied by the laboratory or courier.

Do not invent a customs description or automatically declare the package as a medical or infectious substance. A courier may require specific wording or packaging for exempt human specimens, while another route may apply different rules.

Before dispatching:

1. ask the laboratory what description to use;

2. confirm that the chosen courier accepts the package;

3. complete the customs value accurately;

4. attach any laboratory letter or pro forma invoice supplied;

5. retain copies of the documentation.

Returning Samples from Africa or Other Difficult Postal Routes

Postal reliability differs significantly between countries and regions. On routes where ordinary international post is slow, poorly tracked or frequently delayed, an express courier may reduce the risk of loss.

This can be particularly useful for participants sending samples from certain African countries, remote territories or locations with limited international postal connections.

The decision should be based on the specific country and courier network rather than on geography alone.

Costs and Timescales to Anticipate

The total cost of a remote DNA test may include:

• the laboratory analysis;

• additional participant fees;

• extra collection kits;

• international outward delivery;

• return courier charges;

• currency-conversion fees;

• supervised collection fees;

• non-standard sample extraction;

• urgent laboratory processing.

Return postage is not always included, even when the kit contains a pre-addressed envelope.

The overall timescale consists of several stages:

1. kit preparation;

2. delivery to each participant;

3. sample collection;

4. return transport;

5. case registration;

6. laboratory analysis;

7. report preparation.

The advertised analysis time usually begins only after every required sample and document has been received and approved.

Common Mistakes That Can Delay a Remote DNA Test

Avoid the following errors:

• ordering a private test when an official result is required;

• failing to obtain consent;

• forgetting to request separate kits;

• using different case references for related samples;

• touching the collection tip;

• packaging swabs while they are still wet;

• sealing samples in ordinary plastic bags;

• omitting consent forms;

• sending non-standard samples without approval;

• choosing untracked international postage;

• using an incorrect customs description;

• assuming that express outward delivery includes the return service;

• expecting analysis to begin before every sample arrives.

Contacting the laboratory before collection is usually easier and less expensive than correcting a rejected sample afterwards.

Frequently Asked Questions About Remote DNA Testing

Can Participants Send Their DNA Samples from Different Countries?

Yes. Samples can generally be dispatched separately, provided that every envelope carries the same laboratory case reference and follows the provider’s instructions.

Do All Participants Need to Collect Their Samples on the Same Day?

Usually not. However, samples should be collected and returned within the laboratory’s stated storage period. Testing normally begins only after the complete set has arrived.

Can I Use Cotton Buds Bought from a Supermarket?

Only if the laboratory explicitly accepts them. Household cotton buds may not be sterile and may contain materials that interfere with analysis. Sterile buccal swabs from a pharmacy or medical supplier are preferable when a home kit is authorised.

Can a Remote Home Test Be Used in Court?

Not automatically. A self-collected sample normally lacks verified identity and chain-of-custody evidence. A legal test should be organised through an appropriately accredited provider from the outset.

Is Express Shipping Essential?

Not in every case. Tracked standard delivery may be sufficient on reliable routes. Express courier delivery is more useful when time is limited, international post is unreliable or the package must be closely monitored.

Conclusion

Remote DNA testing makes it possible to compare samples from participants who live in different cities or countries without requiring them to meet.

The process is straightforward when it is properly organised:

• choose the correct test;

• distinguish private testing from legal testing;

• obtain the necessary consent;

• arrange one or more collection kits;

• use the same case reference for every participant;

• collect and dry the samples correctly;

• return them through a trackable service;

• wait until the complete case reaches the laboratory.

For the most reliable outcome, follow the laboratory’s instructions rather than relying on generic collection or shipping advice. Where the result may affect court proceedings, immigration, a passport application or another official matter in England, arrange an accredited, supervised procedure before any samples are collected.