Once you have collected your samples, place the sealed specimen envelopes into the prepaid USPS return envelope that was included with your kit. Seal the envelope securely and mail it by dropping it into any USPS mailbox or by taking it to your local Post Office.
If you wish to monitor the status of your shipment, remember to record the tracking number on the shipping label. You can track the status of your shipment using your tracking number on the USPS website.