Testing kit shows up in plain, unmarked envelope. Although the return address indicates it is as lab, it does not give away what is inside or what the kit is for is for, so if someone sees it they really won't know unless they open the envelope. As well, the company does a variety of testing including for general health, so even if someone knew it was from company, they wouldn't know what the kit was for unless they open it. Inside the kit are detailed instruction on how to collect your sample (also on their website) along with everything you need to collect the sample, including alcohol wipes, lancets and bandaids. The sample is placed back in the box and then the box is placed in a pre-addressed, pre-paid, plain envelope (included in the kit). You drop the package off at a UPS store and it gets back to the lab in 1-2 days.