Yes, you are responsible for sending your sample to us after collection. However, the cost of shipping is included with your kit. All you have to do is to stick the pre-paid shipping label (included inside your kit) onto the box that your kit was shipped in (if your kit does not include a box, use any cardboard container). If you do not have a box or rigid container, you may pick up a free box or Fedex/UPS padded pack at the nearest Fedex/UPS Drop off location. Make sure to check the hours of operations of your closest courier (FedEx or UPS) drop-off location before shipping and avoid shipping right before weekends and holidays to avoid delays. 

Fedex drop-off locations:
UPS drop-off locations: