How are samples returned to the laboratory for testing?
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 because these samples are not bio-hazardous, there should not be any restrictions imposed by customs. Note: Samples should be sent as soon as possible after collection and will remain stable under average shipping conditions, including over weekends and holidays.
