Shipping Questions

We understand that testing may be new or unfamiliar to you and that you may have additional questions. In these Frequently Asked Question pages, we try to address the most common questions that we hear. If your question isn't listed, or if you would like to speak with one of our knowledgeable customer service agents, please call (866) 600-1636 or e-mail us at info@zrtlab.com.

How are samples returned to the laboratory for testing?

Note: Samples should be sent as soon as possible after collection but will remain stable under average shipping conditions, including over weekends and holidays.

Most test kits contain a UPS or US Postal Service return label for sample returns within the US. Testers may choose to purchase an alternate form of shipping at their own expense. ZRT does not typically cover the cost of samples being returned from outside of the US. 

International testers will need to purchase return shipping at their own expense.  These samples are not bio-hazardous so as long as they are packaged according to the Collection Instructions, there should not be any restrictions imposed by customs.

Is it ok to send samples to the laboratory over a weekend or holiday?

SALIVA samples should be sent as soon as possible after collection and will remain stable under average shipping conditions, including over weekends and holidays and during hot temperatures.  If sample(s) will not be sent the day of collection, please store in the freezer and note dates in Section 5 of the Test Requisition.  

DRIED BLOOD SPOT or DRIED URINE samples should be kept at room temperature and will remain stable for shipping over weekends and holidays, and during hot temperatures.

What if I can't find my return label or the kit does not contain one?

International testers- Due to vast differences in international postal systems, we are not usually able to provide international return mailers.

In most cases, a prepaid return label is provided by ZRT Laboratory inside the test kit(s).  If you do not have one, you may send the sample to us via any method of your choosing. (A method where you are able to track your package is recommended.) Please note that ZRT Laboratory does not reimburse shipping charges. If you received your kit from a healthcare professional, you may contact their office to see if they are able to provide a replacement label. If you received your kit directly from ZRT Laboratory, you may contact Customer Service toll free at (866)600-1636. Please be aware that having a shipping label mailed can take up to 7 business days to arrive, which may further delay the testing and validity of your sample.

Is it ok to send samples to the laboratory when it's really hot outside?

SALIVA samples should be sent as soon as possible after collection and will remain stable under average shipping conditions, including over weekends and holidays and during hot temperatures.  If sample(s) will not be sent the day of collection, please store in the freezer and note dates in Section 5 of the Test Requisition.  

DRIED BLOOD SPOT or DRIED URINE samples should be kept at room temperature and will remain stable for shipping over weekends and holidays, and during hot temperatures.

How do I know if the laboratory has received my sample(s)?

If your test kit contains a prepaid UPS label (usually 2Day or Ground service) keep the Customer Return Receipt which includes the tracking information, and affix the shipping label to the bag included inside the kit. The UPS Tracking number can then be used to see whether your package has been delivered to ZRT Laboratory.

Enter your UPS Tracking Number here to find out if your sample(s) has been delivered:

If you did not have a tracking number or can not find it, you may contact Customer Service toll free at (866)600-1636 to see if your sample has been received.

What are your Shipping & Return policies for online orders?

For online orders, see Shipping & Returns under Policies.

How can I find the closest UPS location to drop off my sample?

Click here to find the nearest UPS drop box or location.