there are so many regulations regarding the type, methods, and markings required for shipping lipos that it's easy to do something wrong. however, the size of the batteries that we typically ship fall short of being big enough to cause a headache with regulations. however, I would still highly recommend you talk with whoever you are shipping them (fedex, ups, etc) to ensure you are not violating any codes. from what I remember, something as simple as placing a piece of electrical tape to insulate the leads and prevent shorting the lipo is enough to make people happy with these small lipos. again, check with the courier. lipo's have brought down planes due to improper shipping methods. don't be the guy that brings down a plane.